Trigonometry: Solving Right Triangles… How? (NancyPi)

Published on November 14, 2018 by

MIT grad shows how to solve for the sides and angles of a right triangle using trig functions and how to find the missing sides of a right triangle with trigonometry basics. To skip ahead: 1) For HOW to CHOOSE A TRIG FUNCTION to solve for a side you don't know, skip to time 2:10. 2) For how to SOLVE for the LAST SIDE with TRIG, skip to time 6:18. 3) For how to SOLVE for the LAST SIDE with the PYTHAGOREAN THEOREM, skip to time 8:41. 4) For how to SOLVE FOR THE LAST ANGLE, skip to time 10:38. For my video that introduces the BASIC TRIG functions (sin, cos, tan, csc, sec, and cot) and SOH-CAH-TOA, jump to: Nancy formerly of MathBFF explains the steps.

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HOW TO SOLVE A RIGHT TRIANGLE: If you have to "solve a right triangle," it just means to find all the missing angles and sides of a triangle. When you have a right triangle and you already know at least one of the angles (other than the right angle) and at least one of the sides, you can solve for the other sides using a trig function: sine, cosine, or tangent. When solving right triangles, you can use the memory trick sohcahtoa (SOH CAH TOA) to remember the trig ratios for sin, cos, and tan. Pick the trig function that includes both the side you already know AND the side you're looking for. You can use algebra to solve for the length of the unknown side, to find the missing side of a triangle. Once you have that side, you have two options for finding the last unknown side. You can either: 1) use another trig function, or 2) use the Pythagorean Theorem formula. Then you will have all the sides. Make sure you have found all the angles inside the triangle so that you've really "solved" the whole triangle. If you know two angles already (one of them is the right angle, 90 degrees), you can find the last unknown angles really quickly. Since all three angles have to add up to 180 degrees, you can subtract the two angles from 180 to find the unknown angle in degrees.

For how to identify adjacent, opposite, and hypotenuse sides of a triangle, and for an introduction to the trigonometric functions sin, cos, and tan, jump to my BASIC TRIGONOMETRY intro video:

For more of my right triangle trigonometry and other math videos, check out:

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  • Matthew k 4 years ago


  • Teja Bhai 4 years ago


  • Abel Lopez 4 years ago

    Love ya

  • amty 4 years ago

    Nancy is the best.

  • Douglas Henry 4 years ago

    You got me through Advanced Algebra 3 years ago, thank you!

  • Joshua Posada 4 years ago

    She is the best

  • Miguel Juarez 4 years ago

    I don’t even take math anymore but I still watch 🙂

    • Ba ba 3 years ago

      Miguel Juarez y

    • BK Made ELI 3 years ago

      ight bro you gotta chill

    • Miguel Juarez 3 years ago

      BK Made ELI make me 😂 simp

    • amanda b 3 years ago


    • itsez 3 years ago

      u dropped this 👑king

  • XxNationxX 4 years ago

    Nancy be better than my ap teacher. TY VERY MUCH NANCY🙏

  • In_Motion96 4 years ago

    Matrix Transformations?

  • SinzOfGreed 4 years ago

    Watched just because…Nancy 😀

  • John hence 4 years ago

    Teachers are always telling me that Math is beautiful. Now, I get it.

    • Dan Reynolds 2 years ago

      @Isaac Tesfay Yes but gives us more time to look at her.

    • Steve Clark 2 years ago

      I’ll buy her a house lol, she can work out my hypotenuse anytime ❤😲😉

    • Steve Clark 2 years ago

      Aaaah isn’t that cute, some people just learned a new word… imps – anagram

    • Steve Clark 2 years ago

      I’d like a slice of Nacncy Pi plz nom nom

    • Rishabh Udeshi 2 years ago

      @Doljinsuren Dashjamts r/whooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooosh

  • terawattyear 4 years ago

    I’m really glad I found your channel. You have a nice mix of simple math to calculus. Great for a refresher on many types of math. Nothing I love more than numbers.

    • Paul Jenkins 4 years ago

      Nothing you love more than numbers? Yeah, like 36-24-36.

  • Marcelo Gatica 4 years ago

    Thanks much!! Within 12 days I’m performing my university admission test, and I’m studying as much as I can! And you are really being helpful! Thanks again <3

  • Chaminda Silva 4 years ago

    Thanks for teaching me Trigonometry.
    Good night / Sweet Dreams 🌷

    • Paul Jenkins 4 years ago

      You forgot to say “don’t let the bed bugs bite.”

  • Mahad Omar 4 years ago

    Nancypi Teacher i love You where Comunicate? 😍😍😍

    • Paul Jenkins 4 years ago

      OMG! Hasn’t MGTOW taught you anything about women???

  • justin sharifi 4 years ago


    • ccsvenezuela2006 4 years ago

      How to Remember the Unit Circle (NancyPi):

  • AMotoVlogger 4 years ago

    Its okay, you’re my special right triangle.

    • Paul Jenkins 4 years ago

      Oh yeah, that’s a great pick up line. I am sure she was turned on by it. Gack!

  • SD Hadoken 4 years ago

    Notice me senpai🙏

  • Decaf-Math ASMR 4 years ago

    Nancy, I started a channel not that long ago with intentional Math asmr videos, but I swear yours is unintentional ASMR! I haven’t seen all of them, but you’re doing good work. Also, somehow, YT thinks our channels are related lol, maybe because of MIT, but either way that’s flattering to me, b/c you’re great : )

    • B T 4 years ago

      Decaf-Math ASMR haha!!! Same. I watched her videos when I was in school and now I come back for the ASMR. You should check out Chyco too. He does ASMR math.

  • Hadeed Ahmad 4 years ago

    Can you make a video on cie alevel trigonometry next

  • New Notification 4 years ago

    That moment when you already know everything Nancy explains but you watch anyway.

    • Michael Terrell II 3 years ago

      Haha basically though he gives it a great explication.

    • silverbird58 3 years ago

      i’m too depressed about my factoring lol

    • GTK Gaming 3 years ago


    • Tjbeach 3 years ago


    • Abdullah Alzubaidy 2 years ago

      How’s the top comment gonna read my mind like that

  • jessica Morales 4 years ago

    Can you also make a video about statistics?

  • Elton Lucien 4 years ago

    I really, really appreciate it (right on time), please cover more stuff on Trig if you have the chance.

  • Bunnylow 4 years ago


  • J A 4 years ago

    Thanks a million

  • Harris Naseeb 4 years ago

    Nancy is the greatest!!!

  • OrphanPaper 4 years ago

    hi P I you would think that the ingress of 17 mm per meter per degree would sovle it but got 5.78 & 9.52 that why your there and I.m here i guess

  • Syed Hazrat Hussain 4 years ago


  • weasley_ snipes_ 4 years ago


  • James Parlane 4 years ago

    I have this brilliant idea. How about saying the two other angles must add to 90. Forget the right angle. The only part you really need is tan if you need to find out how high a tree is. walk back 10 metres, get the angle between you and the top of the tree, tan of that times 10 minus one because you are measuring 1 m. from the ground is the height of the tree. Once upon a time here in nz. there was a navigator who did not know how high a mountain was because he did not look at a map or chart as they call it. He programmed the auto pilot to fly but did not check his angles and it was a case of plane plus mountain equals minus 257 people. Perhaps he should have listen3d to wolfman Jack when he said ‘baby if you have the curves, I have the angles’?

  • Robert Collins 4 years ago

    Some old horse came a hoppin thru our alley

  • bravo3 4 years ago

    Excellent run down. As a builder years ago I taught myself Trig to do more tricks with fancy roof rafters etc. That took me a couple of weeks to do what you did in 14 minutes.

    • Paul Jenkins 4 years ago

      But Bravo, Nancy had to spend years in college to learn how to do Trig and other topics in advanced mathematics. It didn’t happen overnight. I’m sure Nancy is an intelligent woman, but she was not born with a BS degree in Mathematics.

  • Saddam Ahmed 4 years ago

    i always owe you nancy

  • Edwin 4 years ago

    Hi Nancy. Thanks for your beautiful video 🙂 Btw for me it was refreshing to see math i knew about 45 years ago.

  • Loren Moore 4 years ago

    Oddly enough you make people like math. I have been watching your videos for a couple years and you have made it so easy that this video I already knew what you were going to do before you did it. You are awesome. Keep it up.

  • TECH TOYS 4 years ago

    I love your maths and also you

  • Richard T 4 years ago

    Can you make videos on Linear Algebra topics or differential equations

  • sundance kid 4 years ago

    how do you write like that ? im really curious

  • dirtyoliver 4 years ago

    Trig is like the reward you get for sitting through a bunch of crappy boring algebra classes

  • Amidamar 4 years ago

    Hey nancy. Could you make a video about functions when thry are increasing/decreasing or monotone ? I cant find a helpfull guide anywhere

  • Sami Nazari 4 years ago

    I’d wife you 🥰

  • Akhtar m Popal 4 years ago

    pleaze teach the ralated rate and optomization step by step

  • Dante Castaneda 4 years ago

    Let’s just forget how beautiful she is and appreciate how simple and unambiguous these math tutorial are. 🙂

    • Paul Jenkins 4 years ago

      Well said.

  • Dante Castaneda 4 years ago

    Can you make some videos for the ACT/SAT math testing?

  • U raaxee Caqligaaga 4 years ago

    Thank you maddam I’m new to your videos but z really awesome and makes difference. Thank youuuuuuuuuuuuuu.

  • The Scrooge McDuck 4 years ago

    Just finished Calc 2, but it can’t hurt to re-learn the basics amirite

  • pasqual vargas 4 years ago

    I love how you smile when doing math.

    • Paul Jenkins 4 years ago

      Do you also love how her lips glisten in the light as she speaks? LOL!

  • Dave 4 years ago

    Nancy, you make being geek so chic! Keep up the great work. You’re a great help to my high school-age daughters.

    • Thomas Panks 3 years ago

      Dave nice one Dave

  • Grace G 4 years ago

    yayyyyy shes back

  • Toni Dunatov 4 years ago

    I love You come to besiktas

  • Khusmeet Singh Ahluwalia 4 years ago

    Can u make a video over curve sketching? That would be really beneficial…

  • Alper 4 years ago

    You are unique. All over the world’s people are watching you. Like me 🙂 Regards from Turkey. Please keep going to upload video 🙂

  • BobC 4 years ago

    Well, I was away for a while and missed several videos. I spent the first half of this year as a full-time volunteer algebra tutor at a local “continuation” high school, for students who weren’t well-served by the regular system. All had failed algebra at least once, and most had failed entire years of school. Many had severe life stresses outside of school, with family, poverty and various drug dependencies and mental health issues. A number of them had jobs, and many were on the verge of aging out of the system.

    The first thing I learned is that, despite being a master of algebra, I didn’t know a thing about teaching it. So, immersion in pedagogy was an initial task.

    The second thing I learned was that being able to teach algebra wouldn’t magically enable these students to learn it. Most weren’t in a state of mind or heart that was conducive to learning anything, much less something as abstract as algebra. The vast majority believed they had no math abilities, and the rest believed algebra had no practical role in their lives.

    With all this stacked against them, they then had to contend with the intense frustration and self-imposed humiliation they felt when they couldn’t do a review problem they had been able to solve a year previously.

    The third thing I learned was that I had to start with these students where they actually were, and not where I thought or hoped they would be. That meant asking if they had slept the night before. Had eaten breakfast. Weren’t too hot or cold. Felt well. Were hydrated. Weren’t (too) high.

    The fourth thing I learned was that to find out where they were I had to become a powerful observer, a gentle questioner, a rock-solid presence for them, and find ways to create a space of safety and careful risk-taking.

    I had to do lots of work on myself. To learn to get close to students without going over the edge. To “love them to death” as one teacher put it to me, without killing myself. To be totally warm and open, yet keep a safe distance.

    I didn’t have nearly enough successes, but damn if I didn’t have some awesome ones! I remember one young woman who would do this low “Ohhhh” when she “got” something, and I remember watching her take a test where she did that twice, during the test!

    There was a very sullen young man who was always high (and a genuine ass of the first order), but who somehow agreed to come in straight enough to give algebra a serious try. He couldn’t do any of the review problems, so I grabbed the prior text and went through it backwards. We got to the point where we found his problem was multiplication: He had forgotten how it worked, and had never memorized any multiplication tables. We started from there and made slow but steady progress. One day walking across the quad between classes, I saw him on the far side: He changed direction to come past me for a fist-bump. Two of his other teachers were also there and were shocked, nearly to the point of tears (as was I). It was the first time any of us had seen him have a positive self-directed interaction with any adult on campus!

    There were more victories like that, large and small.

    Then my savings started to run low, and I had to get another day job as a senior systems engineer. It’s a great job, with a talented team working on cool products. But I find I’m in a bizarre state: I’ve never had a job I liked more and loved less.

    Because my heart isn’t in it: What I want to do is teach! So I’m living on a fraction of my salary, saving money for tuition for my teaching credential, saving money to pay off my mortgage, and saving money so I can afford to live on teacher’s pay in Southern California.

    To tell you the truth, the students who “get it” I’ll turn over to you: They won’t need me for much, and you’ve got that ASMR thing going. I want to work with students who think they have an allergy to math combined with existential dread and nightmares.

    • ccsvenezuela2006 4 years ago

      Beautiful experience. You are right, the first thing to tackle is their fear of math. When we get to high school we are told “you’re going to see algebra uuuh” as if it were a demon. And then in university it is “calculus oooh so difficult”. But we all have a brain capable of math. I blame said fear and the people that don’t know how to teach, who just make students feel worse. Congratulations.

    • Word Sailor ADD INFUNITEMS 4 years ago

      Number Line Nomad and the Duchess of Denominators have profound respect for your sincere dedication. Have a MatheMagical year!

    • main mast 4 years ago

      good job.

    • main mast 4 years ago

      @Word Sailor ADD INFUNITEMS donald duck says thank you from mathmagic land.

    • Gary Lewis 3 years ago

      Interesting story. I was a mechanical designer for 35 years retired now became a Walmart Greeter. Big change for me. Im back at school now getting my degree in Arts for teaching. Im 67 now wish me luck.

  • Felix Pagan 4 years ago

    Hey Nancy I was wondering if you could make a video of solving math problems for the blind? I have a friend who is blind and would love to hear everything your teaching! Thanks so much in advance!

  • Felix Pagan 4 years ago

    Oh my email address is Email me back and let me know if you are able to make a video on solving math problems for the blind! I would love to hear from you! Thanks again!

  • El lord Ali 4 years ago

    Iam so happy to see you keep doing what you do

  • Ahad Tunio 4 years ago

    you are so hot

  • Charles Wallace 4 years ago

    Can’t wait for the negative video!!

  • lendi network 4 years ago

    I kinda love the way you deliver your lectures thumbs up

  • FuzzyWuzaCat 4 years ago

    Can you please teach how to do trig identities I can’t seem to get it right. I always get stuck.

  • Isabella Repole 4 years ago

    I LOVE YOUR VIDEOS!!! Can you make one on partial fraction integration!

  • white nikka 4 years ago

    I am japanese, and I love math.
    I found this beautiful teacher a while ago. Your voice is so confortable.I will continue to listen to you carefully.

    • Nishijima Kento 4 years ago


    • Eman Beats 4 years ago


    • Craig Lee 3 years ago

      Ni hao

    • jDUB1 3 years ago

      His name🤣🤣

    • Kai Perkins 3 years ago

      @Craig Lee thats chinese, not japanese

  • ccsvenezuela2006 4 years ago

    Who’s watching in 2^(10.978710459106357239869086999052)?

  • D Shi 4 years ago

    Wow! Your videos are awesome! The combination of camera trickery and your amazing talent of writing backwards really defines what a quality of maths video is! Keep up the good work!

  • summersea _ 4 years ago

    optimization please

  • Beach&BoardFan 4 years ago

    Sweeeeeeeeeeeeeeeeeeeet the hot math chick is back! 👍

  • Warrior Son 4 years ago

    Are you a Native American..? 😞

    • Scarlet L 4 years ago

      @Warrior Son Being pregnant is a bad thing? How come, Warrior?

    • Warrior Son 4 years ago

      @Scarlet L
      If it’s a wanted pregnancy….it’ll be Honey…I’m pregnant!! 😃😃😎😎

    • Ricardo Gonzaga 4 years ago

      If she is she I would marry her in a beat. The perfect woman!!!

    • Scarlet L 4 years ago

      @Warrior Son Loving the glasses

    • Pkay 4 years ago

      I like how u didn’t even answer u just started talking about emojis

  • Brittany Jane 4 years ago

    The way you pronounced “Pythagorean Theorem” and “emphasis for the syllables” got me laughing! Love it. This video was really helpful, thank you!

  • FancyShoesVlogs 4 years ago

    In Calculus I had a problem factoring the large equations which kept me from passing the class. can you help me out with that?

    • ccsvenezuela2006 4 years ago

      Of course she can:
      Factoring Quadratics… How? (NancyPi)

  • a Botello 4 years ago

    Hi Nancy I just wanted to let you know that your videos helped me tremendously to pass my GED, you are a great person and teacher thank you so much ☺☺☺

  • JAZERLIGHTS 4 years ago

    Great stuff Nancy! God Bless u!

  • rohan mascarenhas 4 years ago

    U are cute 😊

  • Matt 4 years ago


  • silverback17 S 4 years ago

    Why do I suddenly love math

    • Devin Carlson 3 years ago

      Alright david

    • David The wise 3 years ago

      Imagine you are in the shower 🧼 and surprise Nancy pi walking to the shower 🚿 room too
      ❤️❤️ you will be so happy ❤️❤️
      I think 🤔 she is a player
      Not the boring dating girl 👧

    • Devin Carlson 3 years ago

      Someone please unplug the middle easts internet

    • Bhops 3 years ago

      @Devin Carlson 😂😂

    • D'Angelo Howard 3 years ago

      @David The wise Bruh

  • Scarlet L 4 years ago

    Very helpful video, thank you, Nancy.

  • James Axup 4 years ago

    PLEASE CAN U GET A POP FILTER FOR YOU MIC. the plosives ear rape me. love the channel though

  • Ricardo Gonzaga 4 years ago

    Give me a name beautiful princess!!!

  • Jeff Ewart 4 years ago

    nancy what is the circumference of your ring finger?

  • TheMakyato 4 years ago

    why a is 5.4 and c9.6
    i know that 90° triangle have this trick 6-8-10

  • StarDagger Rihannsu 4 years ago

    Obviously hiding her ears because she is a Romulan!

  • Emvolts 4 years ago

    what is this wonderful channel i’ve stumbled on

  • strawberry bob 4 years ago

    i love trigonometry so much and had a blast learning it last year but now im in algebra ii 🙁

  • Rick Harms 4 years ago

    Showing my age, trig tables, no calculator.

  • Joseph Diaz 4 years ago

    lol found it funny how you corrected pythag pronunciation and then said syllables funny. Thumbs up for the video thanks 🙂

  • Michael Loglio 4 years ago

    You have that Susanna Hoff’s look, lead singer for the ‘Bangles’. You know the tune… ‘Eternal Flame’. Quite pleasing to the eye ! With respect to ‘Theta’, I find its use outside of Math interesting, in that it plays a major part in Hypnosis (being the vibrational frequency of the programmable state) or Hyp-Gnosis as I like to spell it Hypnosis even uses the ‘term’…being ‘Triggered’ ! So there seems to be a clear connection to Trigonometry or as I like to refer to it as Trigger-nometry ! I do enjoy recreational Math, kind of gets me into the mind-set for that old TV program of NUMB3RS where the number ‘3’ becomes distinctly recognizable…an Old Wizard

  • Edvin Haxhia 4 years ago

    🇦🇱 i love your voice and it sound so easy to understand trigonometry seen u🇦🇱

  • Jim Flammer 4 years ago

    Very helpful, thank you.

  • Talha Javed 4 years ago

    Please make a video on finding relative maxima and minima.!!

  • Jasmine Rodriguez 4 years ago

    You just explain wayyyy to long I’m sorry . Try explaining a little bit easier thank you 🙏🏼.

  • Frankie 4 years ago

    TYSM my math teacher sucks

  • Umesh pasricha Gmail 4 years ago

    Seeing you just calms me.

  • Umesh pasricha Gmail 4 years ago

    I would like to know in which class do people in the west study all this.. Cause i have seen some high level maths on this channel and then this

  • Vivek Himraj 4 years ago

    When you said i can pick my poison i already had no choice nancy 😔 bc u were already my poison 😣😣😣😣… you’re awesome in every way 🙂

  • Trent Mahaffey 4 years ago

    This is really helping me with my Calculus 7 class that I’m almost finished with.

  • JustAintThatWay 4 years ago

    EmPHAAsis on sylLAAbles
    Nerdie funnies best funnies. 😉

  • sober247 4 years ago

    Your explanation is as clear as your beauty, Nancy 3.14… clear… lol

    • Paul Jenkins 4 years ago

      Apparently, Sober, you have had too much to drink. You seem to be drunk over Nancy’s appearance. You should sober up and remember that pretty faces are a dime a dozen. It’s the personality behind that pretty face that is important. Also, if you are going to compliment pretty girls on their appearance, shouldn’t you also compliment unattractive women on things that make them special? Just saying…

  • I Am Bagel 4 years ago

    Murrell gang😈

  • Kisembo Academy 4 years ago

    Wow, that was quite easily done…. Great video.

  • Jo-Jo bighiker 4 years ago

    She writes BACK-WORDS, LEFT-HANDED !!!!

    • main mast 4 years ago

      maybe the image was reversed.

  • dawid mesjasz 4 years ago

    The thing is all my questions only had a fekin right angle and nothing else and every video on yt has 2 angles

  • Zonia 4 years ago

    Math has suddenly become a lot more interesting.

    • Brandon Kulis 4 years ago

      Thats pretty weird

    • Zonia 4 years ago

      @Brandon Kulis I agree, math is very weird.

  • Isaiah Green 4 years ago

    So much better than my teacher thanks lots

  • Richard Harrington 4 years ago

    You say tomato I say tomahto… pythahgorean sounds badass. My next (and only) metal band shall be called PyThAgOrEaN ^-.-^–~

    • Paul Jenkins 4 years ago

      Wow, a metal band. That’s the ticket dude. Nancy will definitely fall in love with you now…

    • Richard Harrington 4 years ago

      @Paul Jenkins Good vibes from this guy. Amirite?

    • Paul Jenkins 4 years ago

      Richard Harrington I just spoke with Nancy. She wants to go out with you. Remember to bring your guitar. I hope you can sing. 🙂

    • Richard Harrington 4 years ago

      @Paul Jenkins Hahaha

  • Mike MacKinnon 4 years ago

    I thoroughly enjoy watching all your videos. You are a terrific instructor!

    • Hamisi Mbui 3 years ago

      I need help from the whole ferternit to make my dream true of becoming a secondary teacher. I got an a in mathematics 2007

  • Seth Angelica 4 years ago

    Great Vid Nancy! Keep up the amazing work 😉

  • Brice Roodolph 4 years ago

    Thank you so much sweetheart for the video👍🏻👍🏻👍🏻👍🏻👍🏻

  • Jhosh19wow 4 years ago

    My problem is that I don’t know how to put it in the calculador

    • rck3321 4 years ago

      To find a, it is opposite over adjacent so it would be tangent , since a/8 has the number on the bottom in the calculator it would be put as 8tan(34 . For c , it is adjacent over hypotenuse, 8/c. When the number is on the top in the calculator it would be put as 8/cos(34

  • Vongchanh Xiong 4 years ago

    Help alot! thank you

  • Phood 4 years ago

    this actually helped me tremendously, thank you. i was getting so stressed thinking i was going to fail geometry because i couldn’t understand this and you’re the only one who’s explained it well for me. I’m sad people keep commenting on this talking about how they only watched it because of your looks and such. I just wanted you to know that this did at least genuinely help someone.

  • Roma Andaya 4 years ago

    i easily understand her explanation….

  • yura 4 years ago

    I dont get how she went from 93.11 to 9.6? 🙁

  • Tony Ford 4 years ago

    Thank u so much for being my literal math teacher without being there your voice is so soothing and calm and supporting!

  • Will Day 4 years ago

    Thaddeus “Chubby” Chadsworth 1867 -1979.

  • Jesse Sandoval 4 years ago

    I wish my Trig professor was as easy on the eyes as you, I would pay way more attention in class!

    • Paul Jenkins 4 years ago

      Jesse, if Nancy was your real math teacher, you’d never get any work done because you couldn’t concentrate on your work. Besides, you’d frequent the boys bathroom to relieve yourself several times during class. And eventually, you would be arrested for stalking her. Be happy she is not your teacher.

  • Diverse Programmer 4 years ago

    Who is sick of watching StudyPug ads?

  • Marek Małecki 4 years ago

    Use AutoCAD to verify your calculations !

  • Carry on 4 years ago

    I came here just to read the comments,😂🤣.

  • God Dess 4 years ago

    Thank You!!!❤

  • Garret 4 years ago

    I’m a 3rd year engineering student and here I am watching this high school math

  • Fabriz Playz 4 years ago

    What if the angle was B is small b still adjacent?

  • Andranikovich YG 4 years ago

    Thanks gorgeous !! Love the explanation .

    • Paul Jenkins 4 years ago

      What are you, an airline pilot talking with a pretty flight attendant? Give it a rest.

  • Got Any Black Ones 4 years ago

    Thank you this actually helped me

  • TimedGalaxy 4 years ago

    thx cutie

  • Coreybdrums 4 years ago

    If you were my math teacher, I would be paying attention but not to the math xD

    • M.m7 7 4 years ago

      Coreybdrums to what then

    • Jacky li 4 years ago

      M.m7 7 what do you think 🙄

  • jonard lopez 4 years ago

    you make math less intimidating. If i had you as my teacher, i would stay extra hours to watch you. You are beautiful and thanks for the video

    • Paul Jenkins 4 years ago

      Hasn’t MGTOW taught you anything about women? Flagrantly complimenting beautiful women that you do not know and have never met does not turn them into kind, loving, and caring women, nor will they send their love to you in return. It spoils them and has the opposite effect. The more you show them how much you love, care about, or appreciate them, the more apathetic they become towards you, unless the two of you have already established that there is good chemistry between you. Do yourself and all other men a favor and stop building her massive ego. 🙂

    • NS Melodolics 3 years ago

      @Paul Jenkins i made a song for a girl (check my channel) and she still rejected me

  • Chris S 4 years ago

    Thank you! Super simple explanation without any “wandering” profs like to do:)

  • Word Sailor ADD INFUNITEMS 4 years ago

    ✨🥴😁Stillmore Patience and the Duchess of Denominators both enjoy the inspiring clarity and measured pace of your videos. Even Infinigon RounderSmith is quite impressed! You provide a very valuable service! Have a Most MatheMagical 2019 equals 3(673).✨🌈🌝🌅🎪🤹‍♀️🎹⛵️🌠🍀

  • Youngblood 4 years ago

    You saved my ass

  • Eric Boos 4 years ago

    I like math now.

  • Reza Arian 4 years ago

    8 * tan 34 not + 13:28 thank you

  • Fernando Lopez 4 years ago

    Got any lessons on Calculus?

  • Devon Hansen 4 years ago

    Had to think a sec about how the hell she was so good a writing backwards.

  • kenneth flores 4 years ago

    Hottie wish she was my teacher…id definitely pay attention

  • david alberto 4 years ago

    Your so beautiful, I love you so much.

  • Qasim Bisharat 25 4 years ago

    Thank you so much really appreciate it I subscribed and hope to see more from you and you’re really pretty btw

  • VIKTOR BIHAR 4 years ago

    You must be getting really good at drawing things backwards. Am i right?

    • J.P. Mallick 4 years ago

      It’s a light board man

    • VIKTOR BIHAR 4 years ago

      @J.P. Mallick ohhh, i see.

  • VIKTOR BIHAR 4 years ago

    You can easily figure out what side is adjacent, if you can find an angle, and a right angle next to each other, on the same side, than its adjacent. Just for more specific details😉

    • Paul Jenkins 4 years ago

      I think we can all figure out what angle you are operating on…

  • Monique Whittingham 4 years ago

    Super helpful

  • litzc27 188 4 years ago

    thank you so much I was very upset and had no clue what I was doing and it clicked and I am so thankful for you you are a god send

  • طتتت hhhdhd 4 years ago

    thanks but very easy

  • Shannon Williams 4 years ago

    thank you Nancy geometry has become really really hard for me and a lot of videos on here don’t help me like you did thank you now I feel confident I can do this and I won’t give up until I do!

  • Some Dude 4 years ago

    Have a test tomorrow and u came in clutch

  • Cos Ta 4 years ago

    It’s Toa Cah Soh and in one of the Chinese dialects in means big footed woman. 🙂

  • GB MN 4 years ago

    I was building some cold frames to overwinter plants and used right-triangle trigonometry a couple years ago. To the side, cold frames are basically a square or rectangle below a right triangle. Using these equations, the measurements were accurate down to 1/32″, basically as accurate as the tape measure could go. Very practical in building projects.

  • migs324 4 years ago


  • SRX 3v3rest 4 years ago


  • Oscar Tártalo 4 years ago

    ¡Good video!
    Greetings from Argentina
    Saludos desde Argentina

  • Rohith Lohith 4 years ago

    this acc help so much


  • Humbug 4 years ago

    SOA CAH TOA = Six Old Horses, Clumsy And Heavy, Trod On Albert. I’ve never forgotten that.

    • Madii S. 4 years ago

      Humbug Some Old Hippie Caught Another Hippie Tripping On Acid

    • Zaid Alawartani 4 years ago

      Isn’t it Soh

    • ItsArchie 4 years ago

      @Zaid Alawartani Some Old Hippie = SOH

  • Brittney Pillay 4 years ago

    Thank you .You really helped me in maths.

  • The Breakfast Clubber 4 years ago

    wish I had a teacher like Nancy so I would actually pay extra attention in class and maybe understand the subject a bit better.

    • 69 420 4 years ago

      Shadows Of Evil because she is hot?

  • MrGtjake 4 years ago

    This helped me a ton! Thanks so much. Are you going to do a second video on inverse trig functions?

  • Riley Bradshaw 4 years ago

    i think you just saved my lifeeeee

  • Jace Beilman 4 years ago

    I’m only in 7th grade and I’m advanced. I didnt get it but thanks this helped a lot. Like if your math teacher sucks at teaching.

  • Ayush Kumar 4 years ago

    Nancy makes it so detailed and simple. I now finally understand how to do it now. You saved a 7th grader.

    • Cecile Ward 4 years ago

      You’re learning trigonometry in 7th grade?!!

    • Ayush Kumar 4 years ago

      yessss… sadly

  • MDU NTR 4 years ago

    Best example i ever seen on explaining 180 degrees… Nice…

  • ʟᴏᴡᴄᴏᴘʏ 4 years ago

    Mirrored letters? And numbers? My gosh

    The mirror dimension

    • AJ Lucas 4 years ago

      Hopefully you didn’t forget your sling ring

  • iButton Smash 4 years ago

    I never watched a math video to the end… until now! What a cutie pie 🥰 now a byproduct of me being glued to the screen is I can do trig lol. Win-win

  • 69 420 4 years ago

    I have a question is the second answer: is the second side you find the length of have to be bigger than the first length you find?

  • RenRen Kurosaki 4 years ago

    Thank you for this tutorial!i now have a better understanding on this!!! ( ö )/

    • BokimaneZ co 4 years ago

      Woah recent comment

  • Sandels24 4 years ago

    You explain it very well. Thank you

  • c c 4 years ago

    This was sooo helpful, thank you for making this <3 🙏🙏🙏

  • WTW Chris 4 years ago

    Nancy pi please be my algebra teacher I’ll definitely pass my regents

  • Karla Michelle 4 years ago

    so how on earth does she write backwards?

  • M.m7 7 4 years ago

    Your so so prettyyyy

  • I C 4 years ago

    She needs to do ASMR asap!

  • McRib Prime 4 years ago

    Best bloody maths lesson ever thank you.

    • Joseph F. Docherty 4 years ago

      @Paul Jenkins It’s maths, not math; We invented the language mate.

    • Paul Jenkins 4 years ago

      @Joseph F. Docherty LOL!

    • Joseph F. Docherty 4 years ago

      @Paul Jenkins That was a quick response – you near your exams?

    • Paul Jenkins 4 years ago

      @Joseph F. Docherty nope. Just happen to be online. Signing off now. 🙂

    • Joseph F. Docherty 4 years ago

      @Paul Jenkins Bye!

  • leah joseph 4 years ago

    Stop focusing on her looks 😒 she is teaching math not makeup

    • Mahmoud Mahmoud 4 years ago


  • Ashley Lancaster 4 years ago

    this woman is a math earth angel

  • Sarina Miles 4 years ago

    Um thank you why is this the only video I can understand

  • YouTube Account 0x0 4 years ago

    How’d you get into MIT? What was your high school gpa and act score?

  • Therealyngnx 4 years ago

    “You don’t have to like math, but you can like my video” 😁😂

    • FOLegionnaire 3 years ago

      Yeeeea boy

    • Ninz Ian Cabangca 3 years ago


  • sai Malkireddy 4 years ago

    She’s hot for a teacher

  • shahadah lloyd 4 years ago

    Thanks helps so much

  • Nimi Sygns 4 years ago

    beauty and brains

  • Ariana Figueroa 4 years ago

    I learned more in this 10 minute video than I did in 2 weeks in my math class. THANK YOU!

    • Paul Jenkins 3 years ago

      @Sami Khan listen to you… You really can’t handle the truth. Many of these creeps, like you, are, in fact, infatuated with Nancy. Just can’t take your eyes off of her, right. Maybe, if you write Nancy a love song, she will fall in love with you. What do you think? Here, let me start a song for you…

      Well I’m beginning to think
      That man has never found
      The words that would make you want me
      That had the right amount of letters
      Just the right sound
      That would make you hear
      Make you see that you are driving me out of my mind…

      Now, you finish the song…

      Sing that song to Nancy and watch her melt into a sensual puddle of Differential Equations and advanced Calculus.


    • Paul Jenkins 3 years ago

      @Akansha Pantyou’re a young, pretty girl; help Sami Khan build up his self-esteem so he can ask Nancy out for a romantic date. Maybe if you spend some time with Sami, he will fall in love with you. Then you can help rid him of his creepy behavior.

    • Sami Khan 3 years ago

      @Paul Jenkins Dude do you realize youre the one who commented the creepy stuff right… whyre you trying to turn it on meXD get a life dude. Proofs in the comments. Read

    • Paul Jenkins 3 years ago

      @Sami Khan factual info is not creepy. You are creepy because of the pathetic narrative you have chosen to follow and how you keep stalking me. The fact is, you are not intelligent enough to understand why sending love and affection to a woman who is not interested in you is, in fact, not a good idea. But I do teach a Woman 101 class. It is $100 per hour and lasts for two weeks. Let me know when you are ready and I will schedule the class for you. As for payment, I prefer cash up front. Just saying…

    • Jorawar Singh 2 years ago

      @Jasbir Kaur hii

  • pooma_J 4 years ago

    Can’t even focus . Too attractive

  • JR 4 years ago

    I am an engineer.. what am I doing here??

    • JR 4 years ago

      probley a bad engineer ?

    • Paul Jenkins 4 years ago

      @JR no silly, you’re not a bad engineer. You’re just in love with the teacher like so many others on this thread. Hopefully, you will not waste your time and hers by giving her yet another sensual compliment on her beauty. She will, of course, not read it, not respond, and not care one iota about all these compliments. But as a whole, she may enjoy the attention, but only to a certain point.

  • CANUSA Kommando 4 years ago

    I subscribed. A very clear and well thought out video. This is the exact formula for ranging. Anyone who shoots needs to know this!
    Nancy very well done.

  • Jay Me 4 years ago

    Smoke show😍

  • Nusrat Shuchona 4 years ago

    Am from Bangladesh
    And wanted to know from you ,,,How can I solve trigonometry’s any math easily???

  • Moeed Shaikh 4 years ago

    Sorry but I can’t focus on the angle.

    • Paul Jenkins 4 years ago

      Nancy can’t focus on your angle either. In fact, she’s not paying any attention to it.

      But I am sure that if you tell her how much and how deeply you love her, she will be happy to go out with you…


  • Ricky Cortes 4 years ago

    Can’t pay attention seeing her teaching it 🤔😂😬

  • Chunky Chanka 4 years ago


  • d mar 4 years ago

    where were you when I needed you?

  • N-mj Saa 4 years ago

    Use me as ‘I would bongo flonko monko’

  • Daniel Allen 4 years ago

    She single?

  • Derp Skittlezz 4 years ago

    I’m on my little brothers account but Mr.Rastatter, you do very well at explaining this and thank you for recommending me to watch this account

  • Yuyan Ma 4 years ago

    Could you please make a video on inverse trigonometry function as well?

  • Jonel Ong 4 years ago

    Please make a video of missing sides of triangle inside a triangle… For example …
    A triangle has 60 degrees each angle and there are two lines that are intersecting inside the triangle which the both touching the two ends on the base of a triangle

    Hope you imagine it XP

  • Rob Wahl 4 years ago

    Thank you

  • Zan 4 years ago

    Holy shit you saved me

  • lk entertainment Rap songs knowledge 4 years ago

    Sexy mam

  • Hassan Singano 4 years ago

    Hi teacher
    Why calculator in this topic is necessary?

    • Warc Arden 4 years ago

      Hassan Singano not needed

  • Sergio Morales 4 years ago

    Are you writing backwards?

  • Arnessia Walker 4 years ago

    You explained it wayy better than my geometry teach thank you so much….

    • Paul Jenkins 4 years ago

      Arnessia, that’s because your geometry teacher did not know trigonometry very well.

  • Ɗerek S 4 years ago

    Damn if this girl was my trig teacher no cap I would impresss her and actually learn

    • Ravenstrike721 3 years ago

      impressing the opposite sex is a powerful motivation

    • Francis Artanis 3 years ago

      Only when she’s good enough to eat, like this particular lady.

    • brazillo19 3 years ago

      No, just fail her class and have to take it again, then get a 4.0, then impress her. That’s the rule of thumb.

    • Devin Carlson 3 years ago

      serious simp energy coming from all of ya’ll

      she don’t want yo fuckin shrimp scampi

    • Kepler180 3 years ago


  • Carlos Urenda 4 years ago

    Why is she so hot..?

  • paola f. 4 years ago

    i listen to your videos when i want to go to sleep

    • paola f. 4 years ago

      Paul Jenkins IM A GIRL WHAT THE

    • Paul Jenkins 4 years ago

      @paola f. yes, I know you are a girl. What the bleep!

    • paola f. 4 years ago

      Paul Jenkins it’s like asmr, nothing wrong with saying that. it’s not like she looks at her comments all the time anyway

    • Paul Jenkins 4 years ago

      @paola f. all of these compliments that deal with Nancy’s personal attributes, rather than her analytical skills involving mathematics, such as the sound of her voice, her beauty, her sexual energy, etc., merely serve to further spoil her and build her super-sized ego, and provide a tingling feel-good friendship-like connection to the giver. But it’s not real. She is not actually your friend. Complimenting her technical skills and/or her teaching skills, on the other hand, is perfectly acceptable.

      There are so many guys on this thread opening their hearts to Nancy with their warm and sensual comments, wishing they could touch her face and hands and gaze into her eyes in the hopes that fortune would smile upon them and offer a chance for love with her. If only they could have a few moments with Nancy to win her heart and make her fall in love with them. Wouldn’t it be beautiful. Spring is in the air, the Birds are chirping, the Bees are buzzing, and the scent of flowers is everywhere. LOL!

      Sadly, Boys and Men live in a world that has been cleansed of almost all knowledge regarding the proper way to treat and interact with women. Fathers don’t know how to teach their sons to properly engage women in a way that promotes positive relationships and respect for each other. Mothers teach their sons how to behave the way women think men should act, but they don’t have a clue. This leaves society in a gross state of confusion. Hence, I present to you the broken society of the 21st century.

      To complete this conversation and come full circle, it is this total lack of understanding of male/female etiquette that leads men down the wrong path and causes them to fill this thread with blind sensual-based compliments for a woman they have never met, never seen, and never had a conversation with. And this silly behavior is merely a symptom of a much larger problem that is destroying the happiness of men everywhere, which has a residual affect on women as well. This problem has led many men to join MGTOW, which is a solution that actually creates a bigger problem. Men and woman might as well be passengers on the Titanic.

    • paola f. 4 years ago

      you’re making this too complicated, i said a mere 12 words.
      i still don’t think she cares. i also think no one else cares about my comment. i’m not building up her ego or whatever you said.. so go ahead and write another 3 paragraphs bc i can argue with you all day lol

  • Percificus 4 years ago

    Still trying to find Coltrane in this lesson about triangles

  • Jaime Avila 4 years ago

    I really need to learn this, but is to hard looking at the beauty of the video

    • Paul Jenkins 4 years ago

      How about that, an honest fan of Nancy’s Trig video.

  • ElecPrizyy 4 years ago

    i wish you were my math teacher. i would listen and focus waaay better!

  • Sarah Watson 4 years ago

    This graphic is far too “busy”. Use one letter only for each side and leave out the little box inside the triangle. Where do you get all the other numbers?

  • STEFAN FINESSE 4 years ago

    video’s comments:
    5% thanks for the nice explanation
    95% wow you’re so beautiful

    • lloyd kline 3 years ago

      @zafeer i she very sexy, very pretty, smart too

    • Discontinued Account 3 years ago

      1000th like, what do I win?

    • Natnal Mogos 3 years ago

      its just makeup

    • lloyd kline 3 years ago

      @Natnal Mogos she human like other pretty 👩 woman,,makeup, purfume, sexy chothes, hair, lipsticks 💄

    • Random Dude 2 years ago

      95% simps

  • Inzxnity 4 years ago

    Watching this cause I got a test tmw and shit I can even listen to u teaching me cause damnnn u cute asf 🥵🤩😏😍😍

    • CLOUT CHASER 3 years ago

      Inzxnity simp

  • LT. Fenza 4 years ago

    i wanna fucking die

  • jaz squared 4 years ago

    Your awesome keep up the good work.

  • stickman Joe 4 years ago

    i just get lost in your eyes.. 😍😍😍

  • Craig Hunter 4 years ago

    Best explanation Iv heard

  • jana mohamed 4 years ago

    you look really cute

  • Eric Kerswell 4 years ago

    her forehead is quite large,, she’s clever iow

  • RQ physics 4 years ago

    Woow what a lecture

  • RQ physics 4 years ago

    Nancy I wanna to talk with u I from India and also work as youtuber

  • Vurgee_1976Gaming 4 years ago

    I’m thankful for the teaching and the beautiful teacher lol

  • abdullah alujan 4 years ago

    thank you nancy your methods are tremendously helpful

  • Ali Al 4 years ago

    ما فهمت شي لكن شكل المدرسة جذاب

    • Jw 4 years ago


  • Charles Chidsey 4 years ago

    I already know all this stuff. Why am I watching? Oh yeah. She’s a hot chick who can write backwards.

  • sardar wali 4 years ago

    I need some halp plz

  • pindi boii 4 years ago

    What is math?

  • Basketball Is2lit 4 years ago

    Thank uuuu

  • İhsan Eray KETENCİ 4 years ago

    for a week listening i m at a grade that i can see math symbols in your eyes everytime your eyebrows get up.

  • Mary.Catherine 4 years ago

    Thank you so much this helped a ton💕

  • TJ, God of Chaos 4 years ago

    Thank you!, was having trouble with this!

  • Daniyal Khan 4 years ago

    Love you

  • zobry2xxx 4 years ago

    Can u solve this equation: Brains + Beauty = ?

  • Sean 90 4 years ago

    Nancy you fancy you do the math dancy put me in a trancy

  • Steve Santos 4 years ago

    Thanks it does help !!

  • General Shepard 4 years ago


  • Phillip Borbon 4 years ago

    Thanks for explaining it easier and slowly. Now I understand it better than before. Good video.

  • Sean Bramble 4 years ago

    If the diagonal of a rectangle is 120 inches long, is there any way we can find the lengths of the length and the width of the rectangle?

  • HyperdrivePics 4 years ago

    Thanks for this! Had to brush up on trigonometry that I haven’t used in 10+ years and this did the trick. Thanks!

  • jaya tissa 4 years ago

    Well explained and easy to understand. I wish teachers having a difficult time teaching basic trigonometry to their students should this video. So lively! 👍👍👍👏

  • D M Azaruddin 4 years ago

    You are different,

  • Slay With samira 4 years ago

    DJ KHALID: You Smart

  • ROA 4 years ago


  • OFATM 4 years ago

    I think sine law easier and faster.

  • Sultan Abdulla 4 years ago


  • HUGO OCHOA 4 years ago

    It is hard to focus . Specially on these subjects. Plus English is my second language. Thanks anyway. One day I will understand and master all these subjects that never liked but for some reason now I love them.

  • Jai Vaidya 4 years ago

    Hey !!!!
    I need some help.
    Can u help me find out inverse of any unknown trigonometric function. ??
    Like sin^-1 (1/5)

  • Zoran Zdravkovic 4 years ago

    I’d marry u!

  • Nnamdi Mas 4 years ago

    Nancy is Beautiful

  • Моses M 4 years ago

    Nancy you are such a nerd! Thanks.

  • Eddie 4 years ago

    her voice is so annoying , and she talks without saying a lot ,, i hope the educated people out there will understand what i am saying .

  • Justin Fiddler 4 years ago

    thanks for the refresher!

  • baash abiib 4 years ago

    She is so beautiful and smart = sexy squared

  • E Rampersad 4 years ago

    Going to school in the 1970’s
    “Not a Single White Teacher” could explain the 3 angles of a right triangle.
    Neither can you Nancy!!!
    The Opposite side is the Vertical Line
    The Adjacent side is the Horizontal Line
    The Hypotenuse side, is the Angle line that connects the vertical & horizontal line

    • Larry Scott 3 years ago

      But my triangle is rotated. There is no vertical side!!! No horizontal side!!

      You don’t know crap.

    • E Rampersad 3 years ago

      Try rotating your brain, drain the white sshhtt out. To solve “Right Angle Triangle”. Other solution, get your head out of your….

  • Sai Kumar 4 years ago

    You are looking so Pretty

  • Sultan 4 years ago

    I wish you can solve for the sides without the calculator since I may have lost my calculator

  • Janice Rodriguez 4 years ago

    Youre not just beautiful, you are also genious!!!i am mesmerized watching you and finally i do understand now how to solve right triangle.

  • Linh Nguyen 4 years ago

    Thank you – teacher

  • any mouse 4 years ago

    4:33 She’s in love

  • MrBat000 4 years ago

    We need to go out on a date and talk about maths!

  • Hemaraju E 4 years ago

    The first three trig functions completely describe a rt triangle, why other three ? Plz make videos on trig ratios for angles like ೧೦°,೧೫°೭೫° ೯೦° and so on for all trig functions.

  • ChaoticSlx 4 years ago

    I couldnt focus

  • Grant Butler 4 years ago

    What hardware/software are you using to record these? I am a teacher interested in recording my lessons. Thank you!

  • Khaldoun Rahal 4 years ago

    Very nicely explained.

  • Jessica May 4 years ago

    Learnt this for 2 school years, and managed to understand it from a 10 min video 😂

  • Carlos Quintanillaalfaro 4 years ago

    I can’t concentrate, she is so pretty.

  • Scott Farkus 4 years ago


  • Brenden Siedlecki 4 years ago


  • Sheza Siddiqui 4 years ago

    Hello I’m not happy

  • Mr. Singh 4 years ago

    Am gonna pass bekoz of u ❤️😘😘

  • JT Liew 4 years ago

    she’s hot

  • Paul N/A 4 years ago

    my casio calculator does it exactly like that………’re adorable, and smart…

  • Offcl Crew 4 years ago

    Summer vacation and I’m still watching

  • Wesley McLeish 4 years ago

    i have a exam today , this is helping thank u

  • Anyoli Campos 4 years ago

    Thank you so much! I leaned how to to this better from you than I have at all in my classroom!

  • PepeElRockero 4 years ago

    Thank you so much for this video!!! Such a life saver


    hi, I am from India. nice video. which board are you using ?


      Please reply

  • Slii M 4 years ago

    Thanks a lot that’s so nice explain

  • Nate Private 4 years ago


  • jesus gcia 4 years ago


  • frig bi 4 years ago

    she weird liek she uncomfortable talkin the camera

  • exo's vocals 4 years ago

    thank you so much for this video!!! I have to present how to solve a problem like this in a few minutes and before this video i didnt know anything 💀💀

    • Mamta Verma 3 years ago

      He fellow Exo l

  • Sean Nortje 4 years ago

    isnt it 9.65 which means its 9.7?

  • Gilbert Estrella 4 years ago

    Don’t go to school any more but this helps me out a lot at work .machine shop thanks this help me machine my parts at the right angle thanks….

  • raaj singh 4 years ago

    One day before my gcse exam😂

    • Bomber 4 years ago

      SAME BRO

  • Nick Garvey 4 years ago

    I missed the second problem. Was too busy staring at her.

    • Sky Kazukame 3 years ago

      @Nick Garvey there was a second problem?

  • prince kumar prasad 4 years ago


  • Hailey Vang 4 years ago

    Thank you! I finally understand this stuff 😂🙏🏼

  • Slick Wolfy 4 years ago

    Math is just too beautiful to not be looked at

    • 47ronnie the legend 4 years ago


  • Carlos Good-day 4 years ago

    Thanks you. This really helped plus your voice is super relaxing ❤️

  • Jerome Natale 4 years ago

    I spent the whole video looking at her. I didnt learn anything.

  • Jasbir Kaur 4 years ago

    13:25 LIKE or SUBSCRIBE .
    Tell me what to do .LIKE or SUB.
    Check it out😂😂😂

  • I'm not gay but 4 years ago

    Watching this in the summer, i hope this will help when i enter freshman year of highschool soon. Thanks Nancy!

  • Alexander Alvarez 4 years ago

    You are a beautiful mathematician Nancy!

  • sebra amielia 4 years ago

    i now understand

  • Nyctophile 4 years ago

    why 34°? why not any of the other ones??

  • Raya Kelley 4 years ago


  • Alex Moura 4 years ago

    Best video ever, really helped with 8th grade geometry.

  • Kenan.kandzic YT 4 years ago

    Wow ur hot

  • Geddy Jackson 4 years ago

    Very helpful, thank you!

  • Paul 4 years ago

    I like your voice and you’re so attractive. You’re a awesome teacher ☺️

  • Phex_ Raouf 4 years ago

    يلعن ام الرياضيات

  • Yeaniva Seisay 4 years ago

    Thank you so much you are literally saving my exam grade!

    • Mr Clean 3 years ago

      Yeaniva Seisay facts

  • Michael Ascarrunz 4 years ago


  • Legion of Light 4 years ago

    I only clicked cuz she cute

  • William Christiano 4 years ago

    I didnt hear any of that

  • Meg Farrell 3 years ago

    Came across your channel today , and I love it sooo helpful !! Thank u 😆x

    • فصول السنه 3 years ago

      I am a student at the Faculty of Engineering and I am from Iraq and you are from where

  • Ronan Kriek 3 years ago

    such a beautiful mind

  • FOLegionnaire 3 years ago

    And I suddenly don’t hate maths anymore

  • pinche gringo 3 years ago


  • a b 3 years ago

    good job thank you NancyPi

  • Hu Man 3 years ago

    You had me at Hello.

  • Michael Bontia 3 years ago


  • SG10Gaming 3 years ago

    Can you be my maths teacher

    • Red Angry Bird 3 years ago

      If you are watching this video, she already is.

  • Camille Williams 3 years ago

    You help me, thanks

  • Michael scalia 3 years ago

    Ur voice is so annoying

  • Magdaleno Gomez 3 years ago

    Thanks. Easy way to learn.

  • Marito Blanco 3 years ago

    Damn! If you were my math Teacher I would pay full attention 😍

    • Redline Tuber 3 years ago


    • Gaurav Kashyap 3 years ago

      Marito Blanco got

    • Haseeb Khan 3 years ago

      HyperMangi And if the teacher is completely useless like the one I have? I learned more from this than her.

  • Marito Blanco 3 years ago

    Shes mad fine

  • Kanonymous 1 3 years ago


  • Fernando Salas 3 years ago

    A young and beautiful female that actually knows what she is talking about🤩

  • Salah Sanad 3 years ago

    math is so beautiful ❤️❤️

  • saeed aldahari1 3 years ago

    She hot

  • sister sof 3 years ago

    Thank you ! You’ve helped me !

  • Lee Chimfwembe 3 years ago

    This is an AI how can a nerd be this beautiful 🤔

  • Goma Ghimere 3 years ago

    In hindi plzz 👓✌🆕

  • Firenado 3 years ago

    How can students learn when all they stare at in class is your face??

  • Nex 3 years ago

    Why did I watch this entire video even tho I know all of this already

  • Ryan Craigen 3 years ago

    Or we could transpose the 8

  • Joshua Ryan Bonao 3 years ago

    It help’s me a lot. Tnx

  • Norma Hernandez 3 years ago

    Am good at math ,but I dont like math.

  • Norma Hernandez 3 years ago

    I dont like math

  • Emmanuel Nava 3 years ago

    No Law of Sine? 🤔🤔

  • Omm Omm 3 years ago

    @08:57 you are so funny/cute

  • Jacob Carrasco 3 years ago

    OMG! Thank you so much for your help!!! This video really did explain this topic full detail :D!

  • Jireh Sogoan 3 years ago

    Im not even here to learn math… I just click the thumbnail

  • Tanya Davis 3 years ago

    Pretty boring

  • Prãdhüm Shrîvãs 3 years ago

    Ur soooooo cuteeeeeeee😘😄✌ and ur voice is💓

  • Charles Soto 3 years ago

    She forgot to mention about arcsin, arccos, and arctan when your result is lowers than 2.

  • Saurabh Kumar 3 years ago


  • Hoppi Hopp 3 years ago

    Or in German: Satz des Pythagoras (Sounds like Püüütaaagorusss).

  • Karoshi Kun 3 years ago

    thank you!

  • KELLY ASHELLY 3 years ago

    thank u

  • DonKeyhole1 3 years ago

    I had to watch this twice; the second time to learn the math. Nice angles! What’s your sine?

    • Frosticstyle 3 years ago

      Im having to watch this video 3 times still cant focus on the math

    • DonKeyhole1 3 years ago

      @Frosticstyle : I figured out a method that works. Watch the math first to get it down solid, then watch it over and over for the important parts.

  • M B 3 years ago

    READ THIS!!!

  • basic maths Academy 3 years ago

    Great work on trigonometry nancy

  • basic maths Academy 3 years ago

    I am from Pakistan. How can I promote maths channel dear

  • mario beltran 3 years ago


  • Zack Bruins 3 years ago

    Don’t stop teaching, you make it clear and easy to understand

  • Green Ash 3 years ago

    I can’t pay attention to the lesson

  • 45 GORILLAS 3 years ago

    I’m so dumb to solve these questions (ノಠ益ಠ)ノ

  • Gary Lewis 3 years ago

    Can she actualy write backwards or is this a camers trick

  • DODONG GAB 3 years ago

    This is why i love Math.

  • Web Master 3 years ago

    Her halting speech makes this annoying and boring. Many better videos exist that are much more concise and to the point.

  • Cristian Izzini - Endurance Athlete & Coach 3 years ago

    Wow, suddenly I am developing a passion for math………..LOL

  • Badge 3 years ago

    My god, you explain more clearer than my teacher lmao

    • Raneem Abdelghany 3 years ago

      i am still gonna like tho

    • Noah Kim 3 years ago


  • Jack Bohannan 3 years ago

    Thanks so much for this. I took arithmetic, geometry and algebra but skipped trig. Nice to finally know what sin, cos and tan are.

  • ritik dwivedi 3 years ago

    You are so beautiful

  • Xavier Dcunha 3 years ago

    Good awesome video keep it up

  • Ed Cammarata 3 years ago

    Great vidio !!!!

  • Niftynefty 3 years ago

    Math is beautiful but in this case both math and teacher are beautiful

  • Nadim Sheikh 3 years ago


  • M G 3 years ago

    WAIT…did she just say… SEA. LAH-BUHL? LMAO 8:57

    • Snail Girl 3 years ago

      yeah, she was doing it on purpose? did you miss the joke LOL

    • M G 3 years ago

      Snail Girl LOL LOL LOL LOL LOL LOL ROFL ROFL LMAO LMAO!!!!!!!!!!!!!

  • Greenery Bangladesh 3 years ago

    Hi, Nancy, thanks for your such video. But one thing I need clarify that what we can do with this solved right angles?? I m not a science student!!!!

  • Cellmend 3 years ago

    Good Heavens, you have personality changed my life for the better! Thank you Nancy, I will watch every tutorial you have with full enthusiasm😍

  • Isaiah Marshall 3 years ago

    You saved me by mentioning degree mode.🙏thank you

  • SaltySkittle _ 3 years ago

    Thanks. I just learned the basics of trigonometry in one day.

  • Doljinsuren Dashjamts 3 years ago

    I dont understand I am only 10

  • crappy roblox vids 3 years ago

    Wow I didn’t know that Megan Fox became a math teacher

  • Lucky Tan 3 years ago

    Thanks for helping me do my math and for being my inspiration beautiful nancy hehee

  • Samdarika 3 years ago

    Woooaahh too…..advanced…..for……brain……. Very smart!

  • Breno 3 years ago

    if I were young and nancy was around i would have many things i my llife you parents tell your kids to follow her amazing tks

  • teddysurf 3 years ago

    Solving right triangles easy, solving women hard…

  • فصول السنه 3 years ago

    هذا التعليم 😘😘😘😘😘😘😘

  • Boomer Sooner 3 years ago

    So pretty… oh wait, what was i doing, again?

  • William Layton 3 years ago

    A math babe and she’s lefty I’m in love

    • Dark Matter 3 years ago

      Sorry to break it to you but the video is flipped horizontally to make it look readable.

  • Farook Fadel 3 years ago

    she is cute

  • Brandon Espinosa 3 years ago

    😲 ur looks got me in the mood to study now 😂

  • klfmc rjn 3 years ago

    Hot for the teacher.

  • Renante Camangyan 3 years ago

    Yes ma’am your so beautiful ❤️❤️❤️❤️❤️.

  • is me 3 years ago

    Ya fuck that show me how to write on air

  • grace macahilo 3 years ago

    i dont want to use a calculator to solve something…

    • Dark Matter 3 years ago

      Most of the time, you’ll get a random angle that you don’t know what its sin/cos/tan are equal to. Unless you’re asked to write a simplified answer (like BC = 8×tan(34) in this video), you’ll most likely need a calculator.

  • berka ayowa 3 years ago


  • Marcus Po 3 years ago

    Maths is boring any way I’m fine with you 😘

  • Moto arzan 3 years ago

    Could not concentrate at school with hot teacher…can not concentrate with this youtube video either…will have to wait for technology that can download all this stuff directly into brain.

  • suntzuwu 3 years ago

    I learned it as:
    Some Old Horse
    Caught Another Horse
    Taking Oats Away

    • David Lawrence 3 years ago

      Thats AWESOME ….works for me too….thank you !

    • say something 3 years ago


  • sabitri bhatta 3 years ago

    awesome trick

  • VINCENT J BONANI 3 years ago

    Huggs for Lil Nan….!!!

  • Silent Death 3 years ago

    I clicked on this video already knowing people are gonna say she’s beautiful smh, YouTube is just too predictable

  • Bananaaaa342 3 years ago

    nice video plus funny lady

  • Paulina Mania 3 years ago


  • Supreme Legion Jr 3 years ago

    Or something like that, really 🤔

  • Daniel Martinez 3 years ago

    Why can’t all teachers be like this

  • Old School 3 years ago

    So, if a triangle is ‘right’, why do you want to solve it?

    • M H 3 years ago

      Old School lol i get it

  • Anthony Wise 3 years ago

    Thank you

  • Ian Grant 3 years ago

    From now on I am going to say “Pythagórean Theórem” because it just sounds _right_ to me! ❤️

  • Karen Macpherson Wessinger 3 years ago

    in a Trig class now, this video helps so much! thank you

  • Calista Vicente-Bradley 3 years ago

    I have a quiz today it got so confusing for me!!!!!! Ty tho

    • Calista Vicente-Bradley 3 years ago

      I fucking failed the quiz. I know I got two answers right but not the last two questions.. I didn’t get to finish it and I got confused on which angle to solce for and everything.. sigh

  • gerardo flores 3 years ago

    i love smart woman ,i’ll never miss a day for school.

  • Will M 3 years ago

    I’m not buying it.

  • Beats Games Life 3 years ago

    I like your tutorials because you talk like a regular person.

  • Sergio Petersen 3 years ago

    This was really helpful thx NancyPi

  • 32LeafChain 3 years ago

    Hi Nancy 👋😊 thank you

  • TechSmith Sharma 3 years ago

    hey how to get hypotenuse value if a =100 meter, b=100 meter and ab angle is 40 degree so what is the distance of c?

  • Malc0ren 3 years ago

    Damn are you writing backwards???

  • mario arrizon 3 years ago

    math can be beautiful and sexy!!

  • Mark 3 years ago

    How would you know whether to multiply or divide by tan/cos or sin at the end to get your final answer?

    • TOXIC _YM 3 years ago

      Mark Bardett if the variable is up you multiply if it is down you divide

  • gawa kagad 3 years ago

    My brain was crushed

  • Chris Smith 3 years ago

    Nancy, not only are you super smart, you are lush too. x

  • Samuel Aidoo 3 years ago

    May I humbly state that in 10 seconds you managed to describe something that I have spent hours searching for. I do not know what department of Heaven you Angels come from, but thank you and thank you and thank you again.

  • Mr Reddy 3 years ago

    Nancy is the most beautiful girl in the world honestly.

  • TOXIC _YM 3 years ago

    I wasn’t able to focus because she’s hot

  • Ina Perez 3 years ago

    This video helped me a lot , thx

  • Awesomeness 3 years ago

    ….. saved me. i gotta quiz tomorrow and you just helped me BIG TIME! thank you

  • Shaban Hassan 3 years ago


  • TTV Ur Mom 3 years ago

    When ur looking more at the teacher than the board.

    • Mackie On Crackie 2 years ago

      Lexvon 777 wow, you have the humour of a 3rd grader.

    • Arlin Birkby 2 years ago

      Mackie On Crackie oh wow you have the comprehension of Joe Biden. Clearly you didn’t get my reference to munroe writing “I’m shaking and full of tears” during a racist tweet. My comment was meant for intellectuals, clearly you aren’t one.

    • Silver Annum 2 years ago

      @Arlin Birkby oh holy shit damnn dont leave me dont leave me

    • J.C. Gallo 2 years ago

      @Mackie On Crackie He’s disgusting by calling the girl beautiful?

    • Remy 2 years ago

      Arlin Birkby It’s just a complement…

  • TTV Ur Mom 3 years ago

    Damn boi, I don’t mean to flatter, but u r hot.

  • Bill delete 3 years ago

    Problem is what happens when the students cannot use a calculator. Teachers should not be teaching the use of calculators by this time in a students education.

  • harry m 3 years ago

    i think i just fell in love with math. i swear, math. its math i just fell in love with.

  • Aj Soriano 3 years ago

    Cute pronunciations Hahahaha

  • Louis Hambridge 3 years ago

    Fit asf

  • Marc Chilifritters 3 years ago

    This was the best math class I ever had!

  • Sindhu Nair 3 years ago

    Can you teach geometry as well?

  • jony Singh 3 years ago

    Nice vedio I am From India

  • adi the time pass gammer 3 years ago

    I like you.

  • Jorge Verduzco 3 years ago

    I cant concentrate on the math lol

  • Pakijah Shahjadi 3 years ago

    Hey! Can you please make a video of factorisation? Factorisation in this sense mean factorisation of various types of polynomial

  • Edgar Bravo 3 years ago

    Or you can use a tape measure. 😀

  • Bryan Mata 3 years ago

    Thank you! Im doing physics E&M problems and sometimes i need refreshers. These simple concepts we forget can be a pain when trying to learn a new concept. The equations you did helped me get a quick refresher.

  • Shekar Chary 3 years ago

    Wow….. It’s amazing ,I have learnt more than that wt I have practiced
    Thank u sis

  • agankachu09 3 years ago

    Miss, why is my heading aching so much while I’m watching your videos? It’s not you for sure. ..

  • Here Comes Ejdss 3 years ago

    I’m a 4th year engineering student. Why am I here?

    • Mr-Silver 3 years ago

      Here Comes Ejdss cause she’s hot asf

  • Benjamin Alberts 3 years ago

    Let’s just appreciate, she had to write that all backwards

  • Cristina Lexy Reef Tank 3 years ago


  • Trentsum 3 years ago

    My middle school math teacher was straight out of university. Our school had practically no dress code for teachers and students. She was young, fit, and gorgeous. She would always where spaghetti strap crop tops which showed her midriff or tube tops and mini skirts or short shorts. She was also kinda mean, but that just made her even more attractive.

  • Daryl Younger 3 years ago

    Right angle triangle.

  • Julius Morgan 3 years ago

    say i want to build a house. how do i find the right angle with just a measuring tape? there, that’s a useful question

  • jerry schell 3 years ago

    You ave elped me more han anyone else, Thank You

  • Eugene Konyha 3 years ago

    This actually helped and I’m pretty surprised. All other vids didn’t compute w/ me, not just some cuck saying that cause you’re hot. Thanks

  • Marquelle Rowe 3 years ago

    Definitely recommend her to Anyone doing trigonometry she is great

  • Bethany Andrews 3 years ago

    I’m going and redoing my assignment right this time.

  • bmx28kenilworth 3 years ago

    I needed this equation for making complex shapes out of glass.

  • The White Mexican 3 years ago

    I’m not even in math anymore I just watched this cause you’re so cute

  • Tio Aditya 3 years ago

    i always forget about this, thanks for the good explanation

  • Timnit Werasi 3 years ago

    Lovely videos thanks so much❤

  • I be a DOCTOR 3 years ago

    For people who think they’ll never use math in real life after school: have you ever seen a video of some toothless idiot who cuts down a tree and drops it directly on their own or a neighbor’s house or car? Yeah…a simple plumb bob, carpenter’s square (or protractor) and a working knowledge of trigonometry would’ve stopped that from happening.

    • Dannn Merkle 3 years ago

      Carpenters use this stuff all the time. It’s pretty useful to know how long the boards need to be for a given roof pitch. Electrical engineers too, reactive power calculations and such. If there is one part of highschool math I wish I hammered into my head better it’s this.

    • I be a DOCTOR 3 years ago

      @Dannn Merkle Yes I know. I AM a carpenter and DO use it all the time. That doesn’t negate the fact that there are students who say “I’ll never need to know this.”

    • Dannn Merkle 3 years ago

      @I be a DOCTOR I agree. I was trying to reinforce your point is all.

    • I be a DOCTOR 3 years ago

      @Dannn Merkle Ah. Ok. I got you. 👍

  • MR GOAT 3 years ago

    This is so good! Love this channel!

  • Sigh Oh 3 years ago

    Very helpful thank you!

  • Vansh Mehta 3 years ago

    Today I realized that maths in India Is far more difficult ….we did this thing in our 2nd grade ….at the age of 6 yrs …lol😂

    • George Triplow 3 years ago

      Credit card number, expiry date and security code please

  • Dannn Merkle 3 years ago

    I use this sometimes building stuff or calculating reactive power but not often enough to remember completely. This is a pretty clear explanation. Thanks

  • Anthony Gato 3 years ago

    Hot nerd. 🍑🍆

  • Faded.x_ 3 years ago

    I could not remember how to do this to save my life, despite the fact I’m in a physics class and should really remember how to do this. Thanks for the refresher.

  • Jason Jolarpersad 3 years ago

    Thank you for showing me the correct and easy way in doing trigonometry

  • Lakshveer Saini 3 years ago

    I cant understand mam please explain again plzzzz 🤔😕

  • Jim Capone 3 years ago

    Wow, finally someone who can explain this to me! Thanks for SHOWING the algebra: other videos assume you already know it..

  • fadia a.wahab 3 years ago

    First I was bad at trigonometry but after this video I go an A+

  • fadia a.wahab 3 years ago

    Thank youuuuu

  • Billy K 3 years ago

    I subscribed and I have no idea why.

  • K.k Ubana Bassey 3 years ago

    beautiful and intelligent.i will adopt you as my DAUGTHER,role model.

  • Ravenstrike721 3 years ago

    i like how she draws triangles super fast

  • Amanda Friesen 3 years ago

    How tf did she get that 9.6

  • Hype_Beast_Slayer 3 years ago

    Thanks gorgeous

  • Playfilm media 3 years ago

    Hi there! I’m having trouble on this part 10.21. How did you get the answer can you tell me more or show me more.

  • Anthony Tonev 3 years ago

    I’m having trouble solving her telephone number. Which trig function should I use?

  • 코스모스 3 years ago

    미국인 인가요? ^^

  • 코스모스 3 years ago

    실례지만 대학교는 어디 다니나요? ^^ 저도 수학 좋아해요

  • John Brim 3 years ago

    Just about managed to work out the missing angle! 😊
    This is about as clear as it gets. 👍 I honestly wonder 30yrs after leaving school if I had some sort of learning disability. (might just be stupid).

  • Vishwa Goolchand 3 years ago

    Thank you very much 👍

  • Yassen Khamosh 3 years ago

    i don’t like math but i love to watch you i dont know y😉😉😉😉

  • Tony Parsons 3 years ago

    Thanks, good that this stuff never changes, even some years later.

  • Sedara Liyanage Somadasa 3 years ago

    Be aware about your dress cotd

  • Ken 3 years ago

    I could never have remembered SOH CAH TOA. I mean, what even is that?

    My sister told me a phrase that I still remember years later: Oscar Has / A Hairy / Old Ass.

    • Casey Litton 3 years ago

      O my god that’s brilliant lol

    • Chris Smith 2 years ago

      or just remember the phytagorean theorem and sin 30°

  • J Rheed 3 years ago

    How can i concentrate when shes so beautiful…

  • Calicore Gaming 3 years ago

    Do you have a video on using inverse trig functions? Thanks for the help with regular ones though!

  • Hannah Lee 3 years ago

    But does anybody realise she is prob writing backwards so that we can see it normal or am I wrong

  • Joseph Fields 3 years ago

    Nancy reminds me of a line in a movie I saw, “She’s a brain!” . . .”Trapped in the body of a game-show hostess.”

  • Krystopher Westover 3 years ago

    Thanks for explaining it the way you did. I’m tired of teachers who teach as though they are giving a refresher to people who already learned this. You teach it as if your audience has never seen it before.

  • j s 3 years ago

    Goes away…. oh man…a

  • Alvin Jarolimek 3 years ago


  • Anooblikeguy Lol 3 years ago

    Math is beautiful if the teacher is equally beautiful😆😆

  • Mike Dear 3 years ago

    Sub ed

  • The Processor 3 years ago

    very nice. much’re great!

  • Jason Kong aka. Taro 3 years ago

    Thank you so much

  • Ray6669 3 years ago

    I found new love for math :p

  • S!LVER FROST 3 years ago

    Al KASHI and Pythagore theories can do everything you want

  • Xhunter OGChan 3 years ago

    Is the video flipped horizontally? Or is she left handed.

  • mateja martin 3 years ago

    why are all of these comments on her looks it is wierd and john it is a great joke lol

  • Magic Trash can 3 years ago

    I hate math so much I’m a science guy and history and English but math I don’t understand it

  • ████████████████████l███████████████████ 3 years ago

    sure would luv to see you work out the product or quotient of a trig function without using a trig calculator (showing us how its done). Just really curious. PLEEEASE

  • Jasmeen K 3 years ago

    OMG TY SO MUCH! I have a midterm on this and needed it!

  • TrulyEvelyn 3 years ago

    Thank you, you helped me a lot 🙂

  • Antonio Haddad 3 years ago

    Holyyyy thank you so much it helped me so well and now I’m gonna pass this unit thanks to u ♥️

  • Double Oh 7 _ 3 years ago

    Im about to drop my precal class

    Until I found NancyPi

  • FlyingTaurus 3 years ago

    William Kersherner bought me here….

  • James S 3 years ago

    Thanks! Great explanation!

  • Juan Hernandez 3 years ago

    Hello thanks Nancy

  • abdul mohammed 3 years ago

    She’s beautiful. What is this video about

  • loner wolf 3 years ago

    Is that siren in the background?

  • Asuna Yuuki 3 years ago

    This was an amazing explanation. Thank you

  • Danny V 3 years ago

    Came for the math lesson, stayed for the teacher

  • Алексей Афанасьев 3 years ago

    Дизлайки я так понимаю женское общество ставит 🙂

  • Marc Dominguez 3 years ago

    Did you just write all of that backwards???

  • Carlito El Gooner 3 years ago


  • Tawhid Ibrahim 3 years ago

    She is Hot ASF!!!

  • brian sinyinza 3 years ago

    Clear accent ever smiling which attracts attention

  • Subhas Chandra Soren 3 years ago

    Hi nancy.i’m from India

  • Tasman Hielscher 3 years ago

    Ahhh I have the trig test time save meeee

  • Aella Qin 3 years ago

    Thanks so much!

  • Cecil The Litt Guy 3 years ago

    You’re a big help!

  • Tomoko in 4k 3 years ago

    Or u could just measure it with a ruler

  • dia 3 years ago

    omg perverts shut UP.

  • laundry basket 3 years ago

    I already know this but I’m watching it anyway; I just like how neatly you explain things.

  • laundry basket 3 years ago

    If you close your eyes it sounds like Kim Kardashian is teaching math. Your voices are the same haha.

  • Michael Makiwa 3 years ago

    Who else keeps on getting that annoying maths ad

    • Local Goon 3 years ago

      Michael Makiwa *ad

  • Narciso Calimlim 3 years ago

    Good explanation thanks

  • Ambreen Faisal 3 years ago

    Who else is in grade 8 watching this

    • Local Goon 3 years ago

      Ambreen Faisal joe?

  • SuperS 57 3 years ago

    Thank you very much it helped me a lot

  • Santiago R 3 years ago

    Thanks, you’re the best… 1am studying for a test tomorrow. No regrets 😂

  • susan sharmila 3 years ago

    Nancy: it just means find all the missing sides and angles.

    Me: That’s EXACTLY what my teacher said, yet, here I am.

    P.S Awesome video btw

  • Ch Taiba 3 years ago

    Thanx alot… U teach great… I like your method… Thnx again

  • HOng DA 3 years ago

    Thank s

  • daniel arenas 3 years ago

    Thankyou soo much you should consider asmr math videos i mean you should make some

  • None Ya 3 years ago

    Thank you this is a great refresher from college, but now being older i appreciate this even more.

  • Conax Liu 3 years ago

    I’ve learnt this in secondary school 30+ years ago but never had to use it since, so have forgotten all about it. It’s coming back with this video now.

  • david lingaard 3 years ago

    nice explanation here. i tried to solve this in autocad and it works.

  • Courtney Smith 3 years ago

    What if you don’t know any angles other than 90 degrees

    • A level GCSE MATHs by DANIEL DALLAS 3 years ago

      In this case U need to know two any sides, so that using trigs ratios U can express unknown angles. Try my explanation

  • silverbird58 3 years ago

    make it applied with tension , load , force , voltage on those lenths . then jump smaller , as mit grad you should show us far more , far quicker ,

    • silverbird58 3 years ago

      NNONO0o0on its Sally cant tell Oscar has a heap of apples

  • yakup demir 3 years ago


  • Adam Smithson 3 years ago


  • Joe dirt 3 years ago

    Is this video about the cybertruck?

  • Basicslomotion 3 years ago

    💖 💋 💦

  • 1960r2001v1968m2006t 3 years ago

    Liked and subscribed! Nancy, thank you for that outstanding training block!

  • Charles Clements 3 years ago

    How can it be that the sum of the three angles of a triangle does not equal 180 degrees? Some one was talking about hyperbolic triangles and he said that it can be more than 180 degrees or less than 180 degrees.

  • Maria Calado 3 years ago

    Thank you so much. This helped me so bad. I don’t usually comment on videos but I felt the need to on this one. I struggle with math a lot and so I use YouTube to help me all the time. A lot of the time, YouTube helps and I learn. But I don’t remember ever being this interested in math before and I don’t remember learning so much in such a short period of time! You don’t understand how grateful I am for this. You have gotten yourself a new subscriber and I am so pleased to have found you

    Thanks for your help, I’m sure I’m not the only one who can agree

    • Kiara Parsons 2 years ago

      I felt the same way! So helpful

  • flexman909 3 years ago

    Why couldnt have a geometry teacher like her while in school..

  • Ezra N 3 years ago

    Thank you 😘

  • mandiiER 3 years ago

    How do you know which angle to plug in? Eg, you used Cos 34. Could you have used Cos 90?

    • Yumi Laputa 3 years ago

      you never use the right angle

  • Natalia Qu 3 years ago

    I am a straight woman, but I have to tell you you are beautiful.

  • Joan Tau 3 years ago

    Do you mind to do a video about inverse trig functions? I don’t really know the logic behind it.

  • Roger Hupp 3 years ago

    Thank you! This was a great refresher so I could determine the height of a tree on my property.

  • Cooper Haines 3 years ago

    absolute life saver, you prolly just helped me pass geometry tbh😂😂

  • - KingDucktheXIII 3 years ago

    Thx I got a math test on this tomorrowl

  • - KingDucktheXIII 3 years ago

    Can you do one on expected value

  • nick fallon 3 years ago

    May I go to the washroom

  • Sweat Girl 3 years ago

    You are very sexy

  • Slimebojr 1 3 years ago

    Wow thank you so much I have a EOC tomorrow! Very good explanation and funny commentary kept me engaged.

  • Fullmetal Heart 3 years ago

    Thank you soooo much nancy tomorrow is my math exam and i did not knew how to solve it. U r a life saver. Thnk u soooooo much. I owe you one.

  • leso204 3 years ago

    Shit never seen Pythagoras made so complicated …….

    • Yumi Laputa 3 years ago

      thats probably because its not pythagoras

    • A level GCSE MATHs by DANIEL DALLAS 3 years ago

      So, Pythagoras is 1=sin2x+cos2x if U mean that. She explains simple trigs

  • Yasar Beg 3 years ago

    Wow i came to learn maths but I can’t stop looking at her she is pretty 😂😂😂

  • Muthu Kumar 3 years ago

    Super madam
    Tq for give a good hints

  • Dabznite 3 years ago

    Another short term of soh cah toa is Some Of Her Children Are Having Trouble Over Algebra

    • Your typical Indian Fisherman 3 years ago

      Lol that is the best one yet, byt sohcahtoa seems a bit easier.

  • Ron Olson 3 years ago

    Thanks, very well done.

  • Primoral 3 years ago

    I have a unit test tomorrow I think you just saved me

  • Tyler DaSilva 3 years ago

    I already graduated college but I’m gonna subscribe anyway lol. Because uhhh math is great !

  • Beam 3 years ago

    Nancy : dont pronounce it pythagorean theorem

    Also Nancy : sylAbbles

  • Steven Miles 3 years ago

    You’re amazingly beautiful! . . . Oh, and an amazing math teacher

  • SorroWaifu 3 years ago

    Holy shit you saved me from failing exams. My teacher does nothing other than talk, hand out tests, talk about how her disabled son can do it but we cant, use her stupid fucking essential oils, sound like shes gonna get my manager, looks like she will burn down my house, and explain the most possible hardest way to do something rather than the easy way

  • Venkat Babu 3 years ago

    Just two kinds of force or just one with the direction up down or left right. Geometry is a pull of things in the direction. 720 to go.

  • Ahmad Assi 3 years ago

    I wish you were my teacher

  • Samu Zumah 3 years ago

    Dam girl u are bad explaining

    • A level GCSE MATHs by DANIEL DALLAS 3 years ago

      So try my way with Revision SOHCAHTOA is an old style

  • Pelvismen 3 years ago

    Im literally ten years old…

    • Project SynTekky 3 years ago

      d/dx (x^3 + 4yz^2 / 7)

    • Pelvismen 3 years ago


    • Project SynTekky 3 years ago

      Anton Smirnov do you know what this video means? also clearly you haven’t watched the derivatives video

    • Pelvismen 3 years ago

      Not all, but many. Don’t be rude please.And i know what the video means.

  • William Edmondson 3 years ago

    When I first learned to solve right triangles, I thought of SOH, CAH, TOA and thought I invented it. It makes me laugh when I look back now.

    • destiny ovbiebo 3 years ago

      William Edmondson you didn’t invent it; we have been using it.

    • William Edmondson 3 years ago

      @destiny ovbiebo I know I didn’t invent it. I said so. I discovered it one day while looking for a short cut and “I thought I invented it.” If you read my comment with a clear mind you can see that I said “I thought I invented it.” I later found out that it’s been around for a very long time. Can’t you see that in my post?

  • stujlmbrt 3 years ago

    Great teacher, you explain things in proper form which is easily understood. Really helping me out thanks 👍

  • Angel Morales 3 years ago

    Mire ha mi yo tengo halgo ke exponer sobre Hoyente ha distansia local intervieneX y resulta ser mujer y su tratamiento o en momento de las matematica aparese un sinbulo tanbien aplicable mujer no igual de cuerpo pero si de Idima se retigido entose ofisina de ufolojia y xe page

  • Sompunabdi -_- 3 years ago

    what about If you don’t have any length of any sides but I know the area. it’s 100cm²

    • A level GCSE MATHs by DANIEL DALLAS 3 years ago

      If you remember the formula for the triangle area is A=1/2absin(x) so feel free to rearrange. Cheers! More Trigs Revision

  • Safeway Admin 3 years ago

    Really it took that long ???

  • Shawn - 3 years ago

    Thanks so much your great at explaining things

  • Gerald Irvin 3 years ago

    I learned more in the first 6 minutes than with 5 hours with my physics teacher.

    • destiny ovbiebo 3 years ago

      Gerald Irvin really? Y’all gotta speak up

  • SteveLovesGOD 3 years ago

    Now let’s solve for the missing ring 🤔👀 👩‍🏫💍

    • Moncor 3 years ago


    • SteveLovesGOD 3 years ago

      How sway

    • Irony :D 3 years ago

      SteveLovesGOD creep

    • SteveLovesGOD 3 years ago

      You guys don’t like jokes huh?

  • sunil kumar 3 years ago

    easy to understand THANKS didi👍👍

  • Michael 3 years ago

    Very good, Nancy! You covered all my questions. Subscribed.

  • Henry Pido 3 years ago

    Best Tutorial for Begginers.! Can i date you @NancyPi😃

  • toymachine76au 3 years ago

    This is so painfully slow and poorly taught. Awful.

  • Bashiir Cabdi 3 years ago

    Great, thnx

  • Fuzz Zeballs 3 years ago

    she is not a good teacher

  • TheTooginator 3 years ago

    Excellent explanation! I also like the “speed up” and “speed down” sound and visual effect. Well done!

    • Krimo 3 years ago


  • Patrick McLaughlin 3 years ago

    why does “30 60 90” sound so sexy when Nancy says it????

    • Francis Artanis 3 years ago

      Because part of it is sixty nine.

  • Mark Keating 3 years ago

    Dear Ms. Nancy, thanks for trying to help with this. Is there a rule that says when deciding what [adj] value to use for calculations, to do not use the value of the adjacent side that you’ve just solved for in an earlier step? In the first step of this example, you said to use [adj] since that’s a known value, and solved for [a]. I got confused because we just solved for [a], so I didn’t see any reason why I shouldn’t use that value for [adj] in the next step when we wanted to solve for [c]. In the solving for [a], we used the side (8), which was to the left as seen by the perspective of [A]. As we went to solve for [c], I thought – “OK, well since I know the value of [a] I’ll just use that value. As you probably know, it didn’t work. So – is there a rule that says to not use the value of the side to the left of a right triangle when making these calculations? – Thanks = Mark

  • Chris Cheater 3 years ago

    Thanks NancyPi very good explanation 👍

  • Miblive 3 years ago

    Imagine her having a conversation with Danica Mckellar from wonder years.

  • fellovr 3 years ago

    The 289 people who gave a thumbs down on this video are obviously high school dropouts.

  • Dan Mart 3 years ago

    She can teach me trig all day and all night long!!! She is so beautiful!

  • kwokyan chung 3 years ago


  • Krishanth R 3 years ago

    I love that triangle , it’s really nice 😊👍🏻♥️

  • John Vandersall 3 years ago

    NancyPi i love your vids mainley cause your hot but i cant retain all the info i wish i could

  • John 3 years ago

    Thanks, can say it’s concise..It’s even made easy for the “stubborn” . Thumbs up

  • Sean M 3 years ago

    does the A and B placement matter?

  • Alain Mehani 3 years ago

    Math is beautiful

  • SuperBad 3 years ago

    Who would like their teacher to be this gorgeous.

    • Devin Carlson 3 years ago

      ok virgin

    • Frank Spizzirri 3 years ago


    • MANJUNATH DHARWAD 2 years ago

      My ex use to write like this

  • Bhavin Tolia 3 years ago

    Whoa! Inverse writing.

  • Bhavin Tolia 3 years ago


  • Naqib Naderi 3 years ago

    Can I marry you Nancy???

  • CHEYSAS-ជ័យសាស្ត្រ 3 years ago

    so interesting your teaching and set up class

  • Bryan C. 3 years ago

    Not even remotely here to learn math.

  • Intel Gadsden 3 years ago


  • David Wilks 3 years ago

    I can’t concentrate on the triangle.

  • brazillo19 3 years ago

    I was never taught the “SOH–CAH–TOA acronym, but through basic memorization (old school).

    Your methods of instructional mathematics are exceptional, along with your penmanship, soft voice, easy-to-understand, and non intimidating approach to this subject. And, if you decide to take this to the ASMR world, I would be a new SUB.

    Also, teach us how to use the slide rule. Thanks!

  • Ruben Ramirez 3 years ago

    Explicas muy bien

  • Michael Terrell II 3 years ago

    Yes I’ve read I’ve researched and I’ve studied and now I am good at trigonometry.

  • Collin Hunt 3 years ago

    This is the BEST math teacher and channel EVER thank you sm

  • Paul Price 3 years ago

    Simplify things. I was so confused I learned nothing. I’m just a dummy here watching trying to understand.

  • imdahG 3 years ago

    When trying to figure out an angle on how to date an MIT grad teaching math on YT! what’s beautiful + brains and a sweet voice equal= (:

  • Maaifoedie De La Rey 3 years ago

    You should change your name. Really. I almost thought this was Nancy Pelosi’s channel ( ͡° ͜ʖ ͡°).
    Aside : Great content !!!! Edit : I like the ‘glass whiteboard’ technique.

  • Master Chief 00117 3 years ago

    They told us no Calculators for this class. I brought a Slide Ruler. Everybody laughed. Till the teacher said you can use that. By next week. Everybody was learning to use a Slide Ruler…..

  • Tracy Costa 3 years ago

    Easy thanks

  • Brian Kimmell 3 years ago

    My kind of gal 🤗 thanks for all the awesome videos

  • Степаныч 3 years ago

    ты мне втираешь какую то дичь

  • eoin730 3 years ago

    May I go to the bathroom please??

  • frank sigwart 3 years ago

    The 5 Giza pyramid measures all derived from the golden rectangle. 2 right triangle s accomplishments

    • frank sigwart 3 years ago

      41.973 degrees edge
      51.83 degrees apothem

  • Rich DeVliegher 3 years ago

    This is the best explanation I’ve found so I can help my daughter. Thank you!

  • Teresa Agreda 3 years ago

    I’m learning this in year 5

  • Master Blaster 3 years ago

    Thanks for the help!

  • Ju K 3 years ago


  • Jason Michael Kotarski 3 years ago

    Thanks Nancy Py, If someone would’ve told me 25 years ago I’d be watching a YouTube video on Trig to determine the best height of a second story for a building on the side of mountain that needs to be ADA compliant, I might’ve tried harder! Sub’d!

  • Samuel C. 3 years ago

    Y’all been trying to figure out how she writes for the longest. People she just writes backwards it’s not that deep

    • Wandile Myambo 9E5 3 years ago

      No she doesn’t, she writes the right way around, she just reverses the picture horizontally

  • Vinita Badruka 3 years ago

    This is 36 d

  • Gary Lewis 3 years ago

    The thing i would add here is if the angle could have been stated in radian as in 1 rad = 57degs so if you see rads in the problem set your calculators to radians. The majority of diagrams the angle will be in degrees.
    Some programing languages like Lisp used in CAD programs like AutoCAD it takes radians as input.
    So like Cos(a)
    “a” should be in radians.
    For convertion
    a= D×PI/180.
    D is degrees

  • Teos Bellows 3 years ago

    X=rcos(Theta) Y=rsin(theta) Theta = arctan Y/X

  • viethoangchanel 3 years ago

    i love you

  • The Southern Gentleman 3 years ago

    I used this form in a different way when I was laying out for a slab to pour concrete in. Also to make sure the slab was perfect I would measure from corner to corner. Also to make sure I had a sq corner in the first place I would lay out that corner first and then measure one side 8 foot and the remaining side 6 foot I would then square both measurement and add them together and then ask for the Sq root of that number.
    So 8 sqed 64 and 6 sqed 36 added together is 100 and what number squared gives you 100 is 10 sqed. Now you have a sq corner. Then from that corner you measure out the two remaining lengths and join them together at the other corner then measure the two 10 or what ever that length was and they would be the same and you have a square slab ready to build your house or what ever… Yes was a Contractor for over 60 years who has built lots of homes and commercial buildings of all sizes and shapes and when I say level a plumb bob will tell you your building is straight up and down with no leaning of any kind..

  • Joshua Walden 3 years ago

    Can you utilize the unit circle even though its not a special triangle for a=8tan34*degrees*? Ie; convert 34*degrees* to radians?

  • Mlier Peria 3 years ago

    Find the length of the missing side of triangle ABC with right

  • Hypo Flump 3 years ago

    Nothing more beautiful than an intelligent woman to me.

  • Deb S 3 years ago

    I wish we had videos like this when I was in school! I’m sure it wouldn’t have helped tho cause I would not be at home looking up math stuff. I was too busy stealing music….. I just needed a refresher to build a shed hahahahaha! This stuff is confusinern hell.

  • black swan 3 years ago

    I came here because I didn’t listen to what my teacher was discussing earlier.

  • Zaheen Ajmal 3 years ago

    Math is Beautiful

  • Don Martin 3 years ago

    If I know a,b,c C how do I find the angles for A and B.

  • Mf Tripz 3 years ago

    Is there a way to calculate this manually? My calculator keeps coughing on me when i try to do trig

  • Solangelo Hades 3 years ago

    Thanks this was super helpful

  • joseph c j. idukki 3 years ago

    Maths is difficult before watching this video. now maths is beautiful like you

  • Shubham A 3 years ago

    i can’t focus on what she is teaching

  • Saucy Nayyy 3 years ago

    Geez thank you so much. That was a great tutorial!

  • Walter 3 years ago

    This is not a bad video. I’d give it to my 6th grader.

  • John Roehsler 3 years ago

    Excellent video !

  • TrAiNcAz 3 years ago

    That moment you realize Nancy is writing this all mirrored.

  • IN THE SHOP 3 years ago

    Are you Married?

  • Thomas A 3 years ago

    this helped me so much thank u

  • Asad Jaleel 3 years ago

    NancyPi created an excellent instructional video. I tutor geometry students and always look for new ideas and different approaches. The content is all correct and the methodical approach is clear.

  • Bill C 3 years ago

    Nancy why don’t you make some more trig videos. I still don’t know, what is an “arctangent”?

  • Plugster Plugster 3 years ago

    I’ve learnt more in her 2 videos than I ever learned at school. well done that lady

  • Viju Sanjai 3 years ago

    What about the right angled side

  • German Mata 3 years ago

    really good and detailed explanation. thanks. ur beautiful btw

  • German Mata 3 years ago

    mit grad!? nice

  • joe shmoe 3 years ago

    Thank you Nancy, I’ve spent hours trying to figure this out, going to tons of different videos but yours is the only one that explains it clearly, you probably just saved my grade.

  • Readai Adda 3 years ago

    I’m also a maths tutor.

  • Wandile Myambo 9E5 3 years ago

    Thank you, this helps a bunch

  • John Paul 3 years ago

    Very good video explained very well thank you.

  • SisterT is a Child of God. 3 years ago

    I need to know if you can create a video to understand cross section n another of bearings….your so good at explaining the details.

  • HaloGamingX 3 years ago

    The comments scare me

  • Randsurfer 3 years ago

    The adjacent side is also called the adjacent side because it is adjacent.

  • bill sancho 3 years ago

    Tnx a lot

  • Urszula Gromadzka 3 years ago

    Einigen ist nicht bewußt wie ihr ale zum kotzen zeit

  • billg521 3 years ago

    She looks like Angelina Jolie…..gorgeous!!!

  • matrixcn73271 3 years ago

    Been quite some time i had math class…and i needed a refresher. You’re very beautiful! Thanks!

  • nothereforlong 3 years ago

    Nancy appears to be getting hotter, with each lesson. If I don’t do well in class, will she please give me detention? I’ve been a bad boy.😉🌹

  • D p 3 years ago

    She so sweet and beautiful! What an IQ

  • Gustavo de jesus 3 years ago


  • William Robinson 3 years ago

    Your mom’s a right triangle

  • Allison W 3 years ago

    Anyone else here because their geometry teacher doesn’t know how to teach

  • Arc Fire fist Hawk 3 years ago

    I still dont get it ahhhhh my mind is blowing up 😫😖

  • Twobarpsi 3 years ago

    She protec
    She attac

    She writes bac (wards)

  • Jay b 3 years ago

    Marry me 😍

  • Truth hurts 3 years ago

    Thank you for your time. This has really helped out. Pretty smart lol no pun intended.

  • karylle Alta 3 years ago

    How did u get a squared 9:43

  • Emily LC 3 years ago

    I’ve been trying to figure out why I wasn’t getting the right answers for the last 2 hours… I’m so happy I found this video it was because I didn’t have my calculator on the right setting. Why couldn’t my lesson mention this information?!?!?

    • destiny ovbiebo 3 years ago

      Emily LC now you got it!

  • jDUB1 3 years ago

    Ugh she’s so *hot*

    • jDUB1 3 years ago

      7 hours later I actually get it

  • jDUB1 3 years ago

    Cos45°=⅝ 😍😍

  • Jose Juarez 3 years ago

    Did anyone notice she wrote everything in the “reverse” angle? She’s a gorgeous genius!

  • Ben Animate IT 3 years ago

    If you were my teacher I will be always smart. 😍

  • Neal Thompson 3 years ago

    You the real MVP!

  • randy marsh 3 years ago

    How does that relate to reality?

  • Sal Gonzzo 3 years ago

    Nice job!

  • RAHEIM Deofficial 3 years ago

    8:49 What Cool Kids? 😳

  • T amouurr 3 years ago

    Hey, your videos are the only videos that acc help me understand what I’m doing so thank you for that. If you’re able to can you make a video on Cosine and Sine Law, Please

  • Marc Gloriani 3 years ago

    After I watch the video about SOH CAH TOA my teacher is very proud to me, because I can answer all of his questions even I’m not honor student Thank you!!

  • Sara Xatun Guluzade 3 years ago

    Thank you so much! It was really helpful.

  • KAZAZ Playz 3 years ago

    Thank u i might actually pass my test tmr idk

  • melissa tran 3 years ago

    bruh i love u

  • Joe West 3 years ago

    Can theta be at the other end of the hypotenuse that was never explained.

  • Jahit Elmi 3 years ago

    Thank u Nancy u are good teacher

  • Kemal Cleva 3 years ago

    You are my favourite math teacher, and for a good reason …

  • Juan Pablo D Lol 3 years ago

    She cute affff

  • John Fela 3 years ago

    so good

  • Davie Paige 3 years ago

    you saved me from the belt at home lol

  • Andrew Diaz 3 years ago

    Now I can pay more attention in math

  • Izuku Midoriya 3 years ago

    Im so dumb I crossed out C from Cos 😂

  • Marcos Duran 3 years ago

    they need more teachers that look like this!😳

  • Closing waVe 3 years ago

    What if there is no angle labeled

  • lauren pulido 3 years ago

    hi ! i love your videos they have helped me tremendously ! could you possibly make a video explaining the inverse trig functions to find missing angles ?!

  • sniperXD XD 3 years ago

    i wish she was my math teacher.

  • Bustanut 27 3 years ago

    Some old hippie, caught another hippie, tripping on acid is a better memory trick

  • Rick Sprinkle 3 years ago

    Her brains make her so sexy!!!

  • Bryan Calhoun 3 years ago

    Easier for me to label the sides as Opposite-hypotenuse-. And adjacent. Because that’s what they are…. That big B lil B and etc is sort of confusing….. The angle always points to the opposite.. the hypotenuse is always the longest side… So that simplifies it… Then u write SOH-CAH-TOA….. then cross out. THE S THE C AND THE T.. then look at what u know! if u see he angle and know it or also have one one of the other side’s that u also know .. like adjacent.. then u grab Ur scientific calculator.. use the shift key (inverse function). because Ur seeking an angle… (That’s when u use shift) then lets say Ur using Tangent of the angle.. so u would press shit.thej Tangent.. then parentheses do your division of the two known sides… Ensuring that u divide opposite over the adjacent or whatever one is in Ur. SOH CAH TOA elimination.. then hit equals key.. the the D.M.S. Key. (degrees minutes and seconds). that’s Ur answer.. also round up or down the seconds portion at the end…(5 or more u round up.. less than five drop it)

  • Squash Head 3 years ago

    Ok I am a grown man and I should be able to control myself however I have to say. She is so damn captivating.

  • M Detlef 3 years ago

    Triangles don’t NEED to be solved. They were BORN that way!!!!

  • HOH 3 years ago

    I love trigonometry…. This was definitely a great refresher lol. My retainability is atrocious, but watching a quick video like this definitely helps my dumb Homo Sapien brain remember the steps….

  • John barfneck 3 years ago

    i like her ……..i still dont like math….ba dum bum! ….i had neighbor kid who could do trig/calculus in his head before he graduated the 7th grade……he could read german before he was 3……. how about showing us what this math is good for in the work a day world…..and how it can increase your yearly income? show us some real world scenarios for these types of math/solving problems….to be used in……..just saying……………..just some simple everyday examples….blshblahblah means ill shut up now…..

  • John barfneck 3 years ago

    the question is why dont math channels have 100 million subscribers and 20 million views per video?

  • LimJohn John 3 years ago

    how about a cup of coffee?

  • Chuck Mitchell 3 years ago

    I never cared for Math at all until l started working construction 35 yrs ago now l love it!

  • Ruben Alfaro 3 years ago

    This was great. I was trying to do this on my own and I couldn’t remember the formulas. Thanks

  • Derick Leal 3 years ago

    Thank you my beautiful I learned so much

  • Johnny Gallati 3 years ago


  • MK0825 3 years ago

    I genuinely found this very helpful. Especially since I’m a visually impaired student so I struggle when teachers show things on a projector. Thank you

  • Sheeple Slayer 3 years ago

    The Netflix series ‘OA’
    Does it mean “opp adj”? Lol

  • Sheeple Slayer 3 years ago


  • Arvin G 3 years ago

    I learned more with this 13 minutes video than 2 weeks in math subject

  • Flavio Loja 3 years ago

    Why in calculator , can we do by mindly?

  • Rev. Gunn 3 years ago

    It’s special, because you made it

  • Andy Bothne 3 years ago

    i do online school and they have pre-recorded lectures and they were recorded in the early 2000s with awful quality and I don’t retain any information from them. but you explain things very well, have great quality videos and are beautiful imma just start watching your videos instead.

  • Rikin Thakkar 3 years ago

    Wait what am I looking at?

  • DIEGO VEGA LOPEZ 3 years ago

    How do you find the missing side and interior angle of a polygon?

  • Luis Santos 3 years ago

    Thankyou for this is really helped, I was away and missed two days from learning this and now I searched this topic for help and you helped me THANKS

  • Mohammad Romi 3 years ago

    Can you guys stop complementing the lady and complement the explanation she did

  • will Richardson 3 years ago

    She is hottt asf

  • Sho Yu Weeni 3 years ago

    I’d have liked to see this functions graphed and how it relates to triangles, but I guess that’s a different topic.
    I guess it’s just the derivative with x or y being the known side length.

  • Mike Hebebrand 3 years ago

    is she ….are you writing backwards on that glass Nancy?

  • Gracie Mosko 3 years ago

    You make no sense

  • Tripto Pal 3 years ago

    I love your explanation :::)

  • blitzblutz 3 years ago

    Your writing is so neat!

  • Mark_till Till 3 years ago

    Using y and r is more relevant to things you will learn later in calculus.

  • Red Pilled Fox 3 years ago

    I just can’t concentrate! 😜😜😜😍😍😍

  • Michael Mills Lynn Mass 3 years ago

    The maths is very good and when u say How I say u show good math it like make me happy

  • Start Fresh 3 years ago

    Very well done. Nice pace, nice voice, nice demeanor and clearly explained for someone who wanted a refresher, that person being me. Thanks 🙂

  • Bingo123 3 years ago

    Nancy… a small prediction: Your clarity (& analysis of a trig problem) will carry you very successfully throughout your life. So thankful for your time & energy!

  • Raven BH 3 years ago


  • Dexter 3 years ago

    well explained! love the glass technique thought 😋😊😇

  • HUSS3IN 3 years ago

    Just a tip dont do any of this mental always write everyhting down

  • Zach Rossow 3 years ago

    Best video, it helps to explain calculations and gives me a good refresher. Thank you.

  • Chamroeun Sdoeung 3 years ago

    She’s beautiful, I give you that, far as math goes the Asain will explain better in a few words.

  • Jonathan 3 years ago

    How to you square the 5.396068

  • Fiamma Adriano 3 years ago

    I’m on lunch break during a test on this, god help me please

  • Willie Thee goat 3 years ago

    Omg I have been trying to figure out trig for 3 weeks and you finally helped me with this thank you so much 😊

  • Fresh Tortellini 3 years ago

    So many SIMPS in the comments

  • Andy Ramey 3 years ago

    NancyPi, your videos are extremely helpful. You helped me get through college algebra a while back and now you are helping me with calculus for engineers! Your magic X method for factoring quadratics has stuck with me and it has been a lifesaver. You are great at explaining math and i’d like to think you are somewhat responsible for my newly acquired love of math. Keep up the great videos, you are helping the world more than you know!!

  • Joan Chittenden 3 years ago

    Oh my god you saved my life thank you very much

  • Jim Fowler 3 years ago

    Trig, vectors, calculus, love these!!! Despised algebra, however. Bring it on NancyPi! Thank you very much.

  • Michael Brodie 3 years ago

    I thought the Scarecrow settled all this in The Wizard of Oz. I’m watching because you’re way hotter than Dorothy. I’m starting to feel my hypotenuse again. Nice refresher course.

  • Jasminesanober Sanober 3 years ago

    You are so cute and a good sexy teacher😍😘😘😘

  • les allan 3 years ago

    All very good,but can you lift heavy things!

  • Gracie Mosko 3 years ago

    How’d she get 9.6

  • Ludwig Copenhagen 3 years ago

    This reminds me why I totally FAILED trig.

  • tristin smith 3 years ago

    This shit is pissing me off i have a midterm and I’m gonna fail

  • El cuco 3 years ago

    Thank u very much. Thank u thank uuu

  • bai mughtarr cham 3 years ago

    I always enjoy the wisdom i got from watching your videos, am grateful.

  • Pranav Deo 3 years ago

    So informative and helped me so so much

  • alex hutchings 3 years ago

    anyone else crying while watching this because you don’t understand your maths homework

  • Roberto Eduardo Madrazo Estrada 3 years ago

    Excellent video and very well narrated. BTW, …. you are beautiful! I increased my interest in Trig.

  • Micah H. 3 years ago

    these videos helped me so much through my junior year

  • Christopher West 3 years ago

    I use your videos in my classroom often to supplement my own teaching. Thank you for doing what you do!

  • breeze787 3 years ago

    Can I determine the height of a tree?
    Can I figure out the distance to an object?
    Can I plug these values into a formula available from your website?

  • mike moye 3 years ago

    No one else is super impressed that she can write so neat backwards!!!!

  • Just1Guy Metalworks 3 years ago

    Em-pha-sis for the syll-ables 🤣. Great video, your my new trig teacher 🍎😊🍎

  • silverbird58 3 years ago

    its sally cant tell oscar has a heap of apples

  • silverbird58 3 years ago

    flip tan34degree with adj

  • devoid dang 3 years ago

    She is drawing in air 🤣

  • lasso atrain 3 years ago

    Easy do it the machinist way
    Side c = Side b ÷ Cos of angle A
    Side a = Side c × Sine of angle B
    Side b = Side c x Cos of angle A
    Angle B = 180 – 90 – Angle A
    Angle A = a side ÷ by b side = 2nd function Tangent

  • Jordan Newsom 3 years ago

    8:40 I see math is not your only skill here… that text fading out effect it hurting my brain 😄 Nice editing!
    edit: i’m guessing it’s a “Chroma Key” type effect. 🙂

  • Alexis Ruiz 3 years ago

    How come on the second equation the variable was at the bottom.

  • Edward Hugus 3 years ago

    Wonderful, clearly presented video from a beautiful young woman. Thanks, YOUR teaching style is terrific!

  • Am Pm 3 years ago

    was this any easy explanation !!! More confusing…

  • drew sykes 3 years ago

    left handed people rock

  • BeroCheetah 3 years ago

    I believe you can get 1 million subscribers

  • Mikhael Shadow 3 years ago

    Who said geeks are not sexy :), I love girls with brains too… can’t stand bimbos that can’t put 2 sentences together…

  • david lingaard 3 years ago

    Nice teaching, i do not have a trig calculator, so i solve these problems in Autocad, it is very easy

  • Rodan El Khattat 3 years ago

    She kinda looks like Megan Fox

  • Jay peeea 3 years ago

    s i m p s

  • Michael Jetnikoff 3 years ago

    Hi,as most lines curved reconcile this seeing line joining points to make right triangle,sides be basic wave length guide to,POINPARRICLE spheroidal wavefunction,bliss,love thee here,thanx,XAMichael XAMBUNJILOM

  • Charlie Moses 3 years ago

    The way you present to me like I’m 5 years old is very helpful

  • Enrique LaRoche 3 years ago

    SCT (sally can tell ) O/H oscar Has A/H A hard O/A on Always (Navy memory trick)

  • RALPHIE.TANDOG 102386 3 years ago

    BA = 9.7 you round the 6

  • AK FN 3 years ago

    nice teeth mine look like the English kings from the dark ages

  • Vee Williams 3 years ago

    Amazing and true! Thank you for being here.

  • Scott Krumwiede 3 years ago

    Beauty and Math-Wise Brain – Thanks for your Video, helps get Trig easier for me and others!!!!

  • Gideon Temese 3 years ago

    I never liked math but seriously your very cute I learned so much thank you

  • The Low Effort Channel 3 years ago


  • Sai Mathematics Orientation Education 3 years ago

    See Sai mathematics orientation education for trigonometry by SONG

  • Derick Leal 3 years ago

    estas hermosa nancy

  • Hannes Camitz 3 years ago

    TOA actually means toilet in Swedish. 😉

    I’ve never gotten these sides in my thick skull…

    But why are we counting the corners of triangles counter clockwise?

  • Ana Mora 3 years ago

    Thank you for teaching me. This video was really helpful 😭

  • Iboro Udoh 3 years ago

    Thank you, Nancy Pelosi?

  • Nukro 3 years ago

    What if the only angle that is known is the 90° angle

    • Nukro 3 years ago

      How would I find both missing angles

  • Hugh Jaanus 3 years ago

    Why do you say “niney” and not NINETY. NINE-TY.
    The creaky voice American women have, i believe it’s called vocal fry.

  • gli gor 3 years ago

    Nancy i just love you so much

  • irgski 3 years ago

    Hey look – there’s a triangle there!!!

  • 뚝배기브레이커 3 years ago

    Surprising fact: She is left handed ㅇ0ㅇ

  • Jade Variety 3 years ago

    I came to this video because my teacher makes absolutely no sense, so I just given up on her and search up whatever the topic is online lmao. lets just say this video makes way more sense than hers lmao

  • STAVEON SAM 3 years ago

    God dam, she supposed to be a model not a math teacher.

  • 100K Subs Please Sub to My Channel 3 years ago

    I’d love to have her as my teacher cuz she’s polite on ther side my teacher gets in class and starts shouting quickly quickly take out your books we are slacking behind to understand math you need a good teacher who knows how to explain and a teacher that can make math beautiful for you by the way he/she teaches I got more than what I got in 3 weeks by this video thank yiu very much Ma’am

  • Ham D7676 3 years ago

    I do the same shit on my questions and end up with different answers from the answer key. ( I’m using degree mode )

  • Herminia Molina 3 years ago

    How to find sides, if the given is only the angles and area of the right triangle? please help mee

  • Tala sami 3 years ago

    Thank you soo much this really helped!

  • Jupong Tonio 3 years ago

    What if all the sides were unknown and you were only given an angle degree?

  • ShadcubeTV 3 years ago

    How does she do the writing thing?? Is it some weird green screen technique or
    is she just really good at writing backwards?

  • Jason Carmichael 3 years ago

    8:50 – proof you are true nerds if you laughing also!

  • Thomas Hayes 3 years ago

    Thanks was helpful

  • liechter 3 years ago

    Why didn’t I have teachers like that?

  • X-OR 3 years ago

    Nancy’s Pythagorean Theorem is A(2)+B(2)=CUTE(2)

  • Anna Polyanskiy 3 years ago

    your voice is so calming, thank you so much for making these videos in such a calm manner!

  • George Spangler 3 years ago

    Didn’t understand a word you said but I was more focused on your beauty. Damn your HOT, Tangenly sexy.

  • Alexander Bacharyshvili 3 years ago

    do I take it, that works only with right triangles. If I have a non-right triangle , how do I find the value of the sides?

  • Franco Quispe 3 years ago

    Who is cobtangent

  • Elite AMG 3 years ago

    Bruh, I didn’t understand a thing she was saying and I’m failing my math class but fuck it I’ve watched this video like 15 times

  • Mashfiqur Rahman 3 years ago

    so does she really have to write everything backwards?

  • ncc1701 3 years ago

    I’m currently remote learning in quarantine. Thank you so much, this was really helpful!!

    • Kai Perkins 3 years ago


  • A5HH4R 3 years ago

    The way she says tenth ^^ :D.
    Amzing vid btw 🙂
    Subbed and liked, Cos you teach so amazing
    I used the word Cos for the first time in math, after I saw u teach xD

  • kiddace 12 3 years ago

    Just get to the point next time

  • iverson Lv 3 years ago

    My math could be better if I have such a beautiful teacher:)

  • Dan Thevenin 3 years ago

    thank you so much

  • miguel wiesner 3 years ago

    i think that i would be more motivated to go to math class if i had you as a teacher

  • Asphalt 8 GaMing GT 3 years ago

    Bruh if every teacher spoke and explained like her i would get 98% plus in any exam

  • Hazel Larson 3 years ago

    yall are creepy as hell, she’s tryna teach math not get 282838 comments saying “i was too busy staring at her”

  • Maximus 3 years ago

    Damn smart and attractive. Wow

  • Kaitoons 3 years ago

    Ok, the thing that impressed me the most is that she wrote everything mirrored


    Great video and solving techniques.

  • Jack Bulik 3 years ago

    I learned more from this than I ever did in class

  • Jerry PEAL 3 years ago

    Never knew math could be attractive

  • Mark Bliss 3 years ago

    So you’re pretty, ok, maybe that’s what made me click on this one particularly. But damn, you explained it alot better than my teachers video so thanks so much lol

  • Justin Gilfert 3 years ago

    Hmu nancy

  • MaxMOCs 3 years ago


    wasn’t Toa a Bionicle?

    • Liam Newman 3 years ago

      Special Bionicle your right!🤣

  • Kai Perkins 3 years ago

    What’s your ig? I really want to learn math…


  • Rafael Oliveira 3 years ago

    Thanks for the calm and didactic explaining. This solving was very helpful to remember how building a wall/angle for a 3D printer modeling 🙂 This is an example of how important is Math. Timestamp index description was (and is) very helpful in searching the right subject we want to solve. Keep up the amazing work!

  • Joseph kakkanattu 3 years ago

    This video was a big help

  • Zaina Bi 3 years ago

    how do you square root both sides on a calculator

  • Abdullah Sherkoh 3 years ago

    U r cute

  • Mathematics Grade 12L 3 years ago

    Good Teacher.

  • Oscar Guerrero Santana 3 years ago

    Now I know why math is so beautiful I could watch her all day man.

  • mandy 3 years ago

    2020 and I am still learning from you thank you

  • catirerubio 3 years ago

    Too confusing.

  • Robert Adam 3 years ago

    All these simps in the comments

  • carlina wheezer 3 years ago

    i’m sorry people are simp weirdos. this video was really helpful

  • Matt 3 years ago

    Thank you Ms.Nancy this came in clutch

  • Salvador Salinas 3 years ago

    Thank U.
    It is The first video that I watch, with a teacher using a trasparent board. Very didactic.

  • Salvador Salinas 3 years ago

    Sorry, I’m seeing you, but not at the triangle.

  • Alicia avendano 3 years ago

    thank you so much! i don’t ever comment on videos but this helped me so much. “distance learning” is so hard on me and i was crying of how overwhelmed i was until i found this video.

  • htsnstr21 3 years ago

    Great Video! I love the presentation. I’m considering pre recording tutorials for my students since all schools are shut down for the remainder of the school year. I’d like to do something like what you’re doing. Any help would be appreciated.

  • W M 3 years ago

    It’s not fair, beautiful and brains 🧠 some people receive all.

  • Izu 3 years ago

    Internal screaming*

  • Chibuokem Awuzie 3 years ago

    I understand than before thanks alot

  • Transform 3 years ago

    Nice. How you create video?

  • REME 3 years ago

    You are a great “explainer” ….and very beautiful.

    • Hoa The Flower 3 years ago


  • Hemu Pareta 3 years ago

    Esa hi love traingle usne bhi banaya 😥tha. Me A tha or wo dono BC 💔

  • Kar3n 3 years ago

    I allways liked geometry. Is a bit tricky since i learn geometry in spanish but is simple to get used to english words.

  • James Wiard 3 years ago

    big help! thanks.

  • Godwyn Corry 3 years ago

    This is Awesome.

  • Brandon Holley 3 years ago

    Man, I love science

  • Nilesh Panchal 3 years ago

    Good information dear Nancy I am also teacher in india

  • Gavin Swink 3 years ago

    I love math🤩🤩

  • James Situmeang 3 years ago

    I’m kinda confused cause of covid so my teacher can’t teach me so I’m questioning how to do it without angles but get a told number from every side

  • jake k 3 years ago

    cant even concentrate

  • Vibhuti kumar Singh 3 years ago

    Mam I love maths because of u😍🥰😘😍🥰🥰

  • Elaine 3 years ago

    Hello miss NancyPi ! I just really need a little help here .. Can you help me understand this equation .. -csc^2(pi/2) = -1

  • Sam T 3 years ago

    why is everyone being do creepy LMAO learn you math,appreciate and go boys

  • Victoria Kabutha 3 years ago

    quinn fabray as a brunette math teacher….

  • Arya Nimsakhare 3 years ago

    Can you make a video for quadratic equations
    You make maths interesting 🤔

  • Puspaben Bhardiya 3 years ago


  • Monica Carhuay 3 years ago

    Everything looks good but find your right tone to teach. Thank you.

  • William Meng 3 years ago

    8:50 lol

    • Natnal Mogos 3 years ago


  • malcolm wiseman 3 years ago

    If I had you as my math teacher in HS, I would have either flunked or passed. Lol. I would have flunked because I would have been enamored and passed because you explain it perfectly. As it turns out I had a funny-looking man for a math teacher who joked as much as I joked with him. He also gave me the grades I rightfully earned. I flunked. Lol I then went on to College where I majored in math and minored in chemistry and physics.

  • turbodave231 3 years ago

    You are a Great Teacher. I wish I had teachers with your talent when I was taught math in school.

  • Ace Crandell 3 years ago

    This helped me out so much, my Geometry teacher doesn’t know how to teach math. Plus, man you are beautiful.

  • Panini Online 3 years ago

    Very informative

  • Massimo Osti 3 years ago

    Did she write all of this backwards?

  • karina rios 3 years ago

    ok im sorry to be that one pissed off feminist but god can people appriciate that shes actually helpful like yes shes pretty but thats not the point and she must feel so terrible that no one appriciates her actual knowledge. this is literally sexism. you wouldnt do this to a male math teacher.

  • HEALTH & LONGEVITY 3 years ago

    beautiful and smart!👍

    • Natnal Mogos 3 years ago

      flittering LOL

  • Ryan Neil 3 years ago

    The fact that she writes backwards on a clear board is amazing

    • Not_Hacking1 3 years ago

      It’s a mirrored video

    • TXU bby 2 years ago

      Omg that’s true I feel bad

    • communist cat 2 years ago

      Yea it is tuff

    • Paola Rocha 2 years ago

      LOL I was going to say that

    • De'Antae Mayhew 2 years ago


  • Anita Perry 3 years ago

    I always loved math, unfortunately did not pass my love on to my son :-D. Simple explanations, easy solution – BRAVO!

  • Jana Bakr 3 years ago

    Very helpful 🥰 Queen 👑 of math 🧮


    Thank you very much Nancy for your explanation about trigonometry. It is easy to understand.

  • David Rivera 3 years ago

    I’m starting to like math

  • meme meme 3 years ago

    lmao so many simps

  • Discontinued Account 3 years ago


  • paul Hicks 3 years ago

    I haven’t heard SOHCAHTOA in 50 years !

  • Rajender Thakur 3 years ago

    She said trigonometry is everyone favourite 😶🙄

  • Mohamedzakymohamed Zanaty 3 years ago


  • Mohamedzakymohamed Zanaty 3 years ago

    Emmm new

  • Sarah Kathuria 3 years ago

    She gives the vibes of nancy from Stranger things

  • Severus Snape 3 years ago

    Totally made my concept crystal clear a big hand for you Nancy

  • Devil Doc 3 years ago

    I am a fan….learning is fun

  • Adefola Ogunsanya 3 years ago

    Thanks I get it now

  • Mohit Dahiya 3 years ago

    kch b smj m na aay aunty

  • nicojugn 3 years ago

    Thank you, I’m learning this during quarantine so this was helpful lmao

  • MrGordozzzz 3 years ago

    When I went to high school, 50 years ago, I remember kids talking about Trig and how difficult it was. I therefore avoided it. So now I know how it’s used, and it’s seems pretty simple. Thanks, for adding to my education. You’re never to old to learn.

  • Joaquin Navarro 3 years ago

    She explains like how I used to explain things to my mom as a like 4 year old, but it’s ok because, I mean, look at her.

  • Enzio O'Ehley 3 years ago

    Please tell me what type of technology are you using to write on . Are you writing on glass and if so, why is the numbers, letters etc not showing in reverse? How is this possible?

  • Ich Bin Kek 3 years ago

    This video is very helpful, however you didn’t explain what to do when you use sin, and now I’m stuck 🙁

  • Jeruld Ablang 3 years ago

    95% you talk to much
    85% wow your beautiful
    10% hanks for the nice explanation

  • Tembela Matshingana 3 years ago

    Best teacher in the world!!!! Used to hate math but k kw I love it.

  • Adrian Franco 3 years ago

    Woww smart and sexy

  • Joshua 3 years ago

    Fun learning with a hot teacher 😂😎

  • Joshua 3 years ago

    Thanks for teaching me

  • Ahmad Tamim Yosufi 3 years ago

    i would love maths if you were my teacher lmao

  • KRiSPY 3 years ago

    i wish you were my math teacher

  • Kino Dizzle 3 years ago

    I wish I was high on potenuse

  • Ian Whitcomb 3 years ago

    But how do you type it in the calculator?!?!?

  • Baleful 3 years ago

    Thank you so much. I was bashing my head against the wall trying to understand it reading from a book in an online course. Seeing it visually helped a ton, thanks!

  • Nicholas Champagne 3 years ago

    Hi Nancy, if your wondering , Yes You are the best Math professor on the planet, you are attactive, but your most beautiful attribute.
    Your highly intelligent
    Smart and beautiful, thanks

  • Rodrigo Gomes 3 years ago


  • Xplay349 Folk 3 years ago

    how to do if it’s C

  • Johan Garcia 3 years ago

    Dam Nancy be my teacher

  • Rafael Diaz-Islas 3 years ago

    Nancy: sylábles

  • Sprint Bolt 3 years ago

    Thank you❤

  • Gavbot G 3 years ago

    Some old hippie caught another hippie tripping on acid

  • ali 3 years ago

    My professor: posts a 2 hour lecture notes and me not understanding anything

    me: watches a 10 minute video and understands it

  • Miguel Cruz 3 years ago

    I’ll marry this lady …. some body let her know please

  • Kadir Gokhan 3 years ago

    Ya sen nesin ya, insan mısınnnn

    • Kadir Gokhan 3 years ago

      i am now learning calculus 2 , but doesnt matter what the subject is, i watch this video cuz of just her

  • Eboni Lawson 3 years ago

    You’re seriously a blessing for making this so simple!

  • Mangooo Pods 3 years ago

    this is the biggest simp comment section ive seen yo

    • Giraffe with Space Depression 3 years ago

      This is a valid statement.

  • MICHAEL BUTTON 3 years ago

    You’re a brilliant teacher and thank you so much. I’m retaking maths at the age of 38 and finding out that what I thought was an impossible subject is really quite enjoyable.

  • Christian George 3 years ago

    This helped me so much
    Thank you

  • Patched Peach 3 years ago

    Taught me more in 13 minutes than in a terms worth of maths

  • Anthony Blake 3 years ago

    right before a test…..thank you!

  • Arun Roy 3 years ago

    Granny Mam

  • Anjo same here 3 years ago

    How adorable you are 😍

  • Marco Deluca 3 years ago

    When you speak I am all ears but can’t figure it out. My question is if I need to solve angle and I have opposite 17 and adj 29 but don’t have angle???

  • Tarekegne Anteneh 3 years ago

    bravo sis

  • Arvind Gaddam 3 years ago

    in our school, they explain this is more easier way than the way you teach

  • Na Zombie 3 years ago

    Thank you!!! Great explanation!

  • Angel Rivera 3 years ago

    U can teach me anything

  • Kyle P 3 years ago

    All of a sudden I’ve taken an interest in trigonometry

  • ups sikatara 3 years ago

    mam u are so beautiful.

  • Kristina Sheikh 3 years ago

    Thank you so much, your video is easy to comprehend. I am using your videos now to prepare for my upper division BioPhysics class, you also aided me in my Mathematical Stats class. Thank you again. You’re awesome. ^_^

  • Giraffe with Space Depression 3 years ago

    Bro, why is everyone so creepy in the comments tho?

  • Tynan Smith 3 years ago

    I’m so lost Rn ……..“ In those eyes”

  • Pat Daly 3 years ago

    cheers for clarifying TRIG for me

  • Im Boo 3 years ago

    Math just got a whole lot better boys

  • jojo 3 years ago

    how did she write with the marker its not like its on glass cause then it woud be backwords.

    • Dyson 2 years ago

      She simply mirrors the recording after.

  • ashgfx 3 years ago

    she fine af

  • Daddy Shrek 3 years ago

    Damn all you simps I’m the comments 😂

  • Luke Stemen 3 years ago

    Why can’t she be my math teacher bruh, I got big country in the corner going through slides

  • Sandra Stewart 3 years ago

    Wow! This is so great

  • Krystal Bennett 3 years ago

    THANK YOU 🙏🏿😢

  • Samuel Brant 3 years ago

    Here we are admiring the beauty of maths, and no its not the work 😉😁😄

  • Vincent Vessels 3 years ago

    I can’t thank you enough for helping me with this 🙏🏻🙏🏻🙏🏻

  • OUT DOORS WITH IZAIAH 3 years ago

    She’s using 70% part of her brain compared to a average human which uses i think 3 %

  • FargoBandzTV 3 years ago

    Math teachers have to be Fat Old and Ugly… “Nancy hold my beer.” 🍺

  • Ubuntuyou 3 years ago

    Is theta always the smaller angle or can it be either?

  • Mr. mustachecat 3 years ago

    12:36 am, check out this vid yesterday to learn, go it, came back to make sure i was right, then notice how beautiful is the teacher holy damn

  • talenttrading 3 years ago

    It better equal 180 degrees. (Or else!)

  • Ravi Kumar 3 years ago


  • Babies4Breakfast 3 years ago

    This video really helped me, Thanks

  • minlicity 3 years ago

    my teachee takes 3 weeks, several assignments to teach this while she does it in 13 minutes

  • mehdi darany 3 years ago

    Hello dear Nancy. I am a math teacher in Iran. I am proficient in many software for virtual learning and I can use them to teach my students, but I don’t know how you make these educational videos ?! Do you write on special glass and then teach with a special type of recording and filming? Are you fluent in writing the opposite? If possible, help me make this kind of filming. thank you.

    • Dyson 2 years ago

      Hello, I am not Nancy, but she is using a clear whiteboard to record the videos, and then mirrors her footage so that it looks the right way to us.

  • mehdi darany 3 years ago

    خیلی عالی.

  • Lillian Heiberg 3 years ago

    These sort of math videos always bother me because I don’t know if they’re writing backwards or if i’m just dumb and they can write normally

  • cedrick mabowa 3 years ago


  • Kepler180 3 years ago

    i had to put it in 144p so i could actually concentrate on the video instead of her

  • コーヒーゼリー 3 years ago

    😊 thank you so much!!

  • Melody Tempro 3 years ago

    shes a good teacher!!! 🙂

  • dharmendra Singh maurya 3 years ago

    If we not use of calculater then how to find valu of tan34

  • Pocketpool Maverick 3 years ago

    I’ll use this for my lava lamp repair buisness thanks lady

  • RoboKrash 3 years ago

    what are we talking about again?lol

  • saacid ahmed 3 years ago

    wow i liked this math can i got phone to get more math video.

  • k s 3 years ago

    As an Airline Pilot i definitely in love with your channel and you too..B

  • Gio 3 years ago


  • Gothboi Theo 3 years ago

    marry me

  • Luki Dujmovic Zakaria 3 years ago

    you mention conventions and standards – yep, precisely those are for quite some of us a torturer… it is great how your guidance leads beyond that by explaining playfully those rules… thanks… wow… how releasing feels beyond fearing the math

  • Keron Nicholson 3 years ago

    You make everything so easyyyyy

  • BrOcCoLi SaLaD 3 years ago

    Help, 125° and I need to find the height of a building, I’m about to jump off the building it’s so hard.

  • Straight Off the Cob: A Corny Guide To Middle Math 2 years ago


  • tjiseclipsed 2 years ago

    Finally, a woman teaching me math ( and a beautiful one at that; god do I love the internet).

  • Abdullah Jawid 2 years ago

    Very beautiful teaching

  • Josh 2 years ago

    I have spent the last week a ball of anxiety and stress ( shit I don’t understand any of this sin cos tang). In 3 videos I now have a basic understanding and feel confident enough to start working on homework without worrying that I am just throwing sand into the wind.

  • Daniela Slyomovich 2 years ago

    i love u Nancy pi

  • TARA SILL 2 years ago

    NANCY!!! OMG! you are literally saving my brain in my pre-calc class. Thank you for making videos that are so easy to understand!

  • Michelle Bazil 2 years ago

    Need to find factors of trinomial
    42w² + 20w – 2


    I like the ways you solve problems in mathematics, nice work.

  • B. Eder 2 years ago

    She Explains this so much easier than everyone else.

  • Mario Silva 2 years ago

    wow, very confuse
    why not –> Sin 34 = BC/AB and Cos 34= AC/AB, so simples, so simple

  • Maeducator Singh Sir 2 years ago

    Nice ma’am
    Your teaching is do good as well as so smart

  • Bernhard Stett 2 years ago

    If my maths teacher in Year 11 had explained trigonometry this clearly I might have passed!

  • Dash Km 2 years ago

    im gonna study with her alllllll day

  • harnoor basra 2 years ago

    THANK YOU SO MUCH may god bless you Nancy

  • Luba Luba 2 years ago

    When multiply out 8tan34 I don’t get 54 wish you show us calculation

  • Seynabou Aminata Diallo 2 years ago

    Not sure if I can thank you enough for making this video 🥺

  • Pranav Murdeshwar 2 years ago

    You are beautiful 😘

  • Avro 2 years ago

    ur so hot ;P

  • FILAY Bull 2 years ago

    does sin always go into csc? one of my answers is asking for the value of sin Y which is 15/17 but since csc is opposite 17/15 is also on the sheet. do i just pick 15/17 or do i always pick the opposite for sin cos tan?

  • Brt Yildirim 2 years ago

    what system u use for this virtual board system?

  • Noosan 2 years ago

    make an onlyfans

  • Chalo Kips Kips 2 years ago

    You actually have a special talent and clear explanation i now get it keep it up you are so amazing

  • Blue Cloud 2 years ago

    ………I had to watch 10 times to get it. The first 9 times were like “what”…May I go to the bathroom, please?

  • Mybaris talalaikin 2 years ago

    Молодец Нэнси умеешь считать!)

  • Vianth Manichan 2 years ago

    When ever I have an exam I watch this video

  • No Vin 2 years ago

    I had to watch this twice because I forgot it was a math lesson the first time.

  • MindOverMath 2 years ago

    I found you through the suggested videos. Your videos are vey informative! I just made a YouTube Channel due to your inspiration. Keep up the Videos! Just Subbed! Good job!

    • Arlin Birkby 2 years ago

      Thank you so much for subscribing! It means a lot to me! Welcome to the nancy gang!

  • Graham Goater 2 years ago

    Very useful and very clear. Makes it much easier helping my daughter with her maths. But one burning question: You can’t be writing on a glass screen backwards, so what “magic’ is going on there? Many thanks Nancy.

  • Cute Beauty 2 years ago

    thank you

  • Patrick C 2 years ago

    The answer is 5. Lol

  • Agara Mancing 2 years ago

    Nice nancy…

  • Kaila Morrison 2 years ago

    I have a test, exam thingy. And it’s on Thursday, and i think ima fail. It’s about Financial Mathematics, Indices and Right-angles triangles. And I’m bad at maths, it’s hard for me to study and this test is in like 2 days. I’m stressing.

  • Joel Masheke 2 years ago

    I can’t focus man 😭 I can’t stop looking at her 😭 am out 🤦🚶

  • Samuel Pineau 2 years ago

    This is the first teacher I can focus on what she says

  • Ali Ucar 2 years ago

    5:15 what if the opp is the only number available to me?

  • Chad Billings 2 years ago

    Thank you for this!

  • Call me ADAM 2 years ago

    Or U could have just 90-34=56

  • MANJUNATH DHARWAD 2 years ago

    The cutest mam I ever seen

  • Aimee Timmins 2 years ago

    Just refreshing my high school math from back in the 1970’s. Yay for a great teacher here!

  • fOrGamztalkz Z 2 years ago

    Hi Nancy! I just want to appreciate your help! you have helped me so much throughout high school.

  • Kathy Reyes Hernandez 2 years ago

    This like Math ASMR! 😂

  • Jade O'Connell 2 years ago

    im like 2 years late
    but mrs. nancy sounded super shy and also i think we should be commending her more on her help and know how versus just her looks, although she is very pretty she is even more so smart

  • Shaan Sidhu 2 years ago

    Holycrap she is distracting lmao

  • Dula Ali 2 years ago

    Oh God gives you good mind set at same time you beauty

  • B 2 years ago

    I wish you’re my professor

Comments are closed.