Law of Sines… How? When? (NancyPi)

Published on May 5, 2020 by

MIT grad shows how to use the Law of Sines to solve a triangle for missing sides and angles. To skip ahead: 1) AAS or ASA case, when you're given TWO ANGLES AND A SIDE, skip to 0:17. 2) For how to know WHEN to use the Law of Sines in trigonometry, skip to 5:55. 3) For when the SSA ambiguous case comes up, and there may be one solution, two solutions, or no solution, skip to 6:32. Nancy formerly of MathBFF explains the trig steps to find the missing sides of a triangle using the sine function in this basic introduction to the Law of Sines formula used in trigonometry, geometry, algebra 2, and precalculus. This trig law is also known as the Sine Rule. It is helpful for solving OBLIQUE triangles with trigonometric functions. For help with and examples of solving a RIGHT triangle using trig functions, jump to For an intro to TRIGONOMETRY BASICS (sin, cos, tan, csc, sec, and cot) and SOH-CAH-TOA, jump to:

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If you need to "solve the triangle" in a trigonometry problem, it just means to find all the missing angles and sides of the triangle.

WHAT is the LAW of SINES? Say that you're given an oblique triangle, meaning one that is not a right angle triangle, and you need to solve it. If you know two angles and at least one of the sides, you can solve with the Law of Sines trigonometry formula. The Law of Sines says that the sine of one angle over the side opposite that angle, equals the sine of the next angle over its opposite side, which equals sine of the last angle over its opposite length. These three ratios equal each other, and you can use these proportions to solve for unknowns.

Say that you're given that angle B is 34 degrees, angle C is 110 degrees, and side b is 14. We know two angles and one side. What's missing, or what we're looking for, is side a, side c, and the measure of angle A. That missing third angle, angle A, we can find very quickly without using any special new law or trig identity, since the sum of the degrees in a triangle is always 180 degrees. Subtracting the two known angles (34 and 110 degrees) from the total 180 degrees gives that the measure of angle A is 36 degrees.

HOW to use the Law of Sines: to find the missing two side lengths, we do need the Law of Sines theorem. First write all the ratios from the Law of Sines: the sine of each angle, over the length opposite. We write the sine of 36 degrees over the opposite side, side a. This equals sine of the next angle, 34 degrees, over its opposite side 14. And finally, that equals sine of the last angle, 110 degrees, over the opposite length, the unknown c.

If we look at just the leftmost two ratios, we see that we can use that equation to solve for a. So we separate that part out to solve: sin(36)/a = sin(34)/14. An easy way to solve a proportion like this is to cross-multiply. This gives us 14sin(36) = a*sin(34). Now it's more clear how to solve for side a, by just dividing out sin(34) from both sides. So we get that a is equal to 14*sin(36)/sin(34). To get a number value that's practical as the length of a triangle side, you can use your calculator to get a decimal number. CAUTION: since we were given angles in degrees, make sure your calculator is in degree mode, not radian mode, so that you don't get the wrong answer. The side length a is then approximately 14.72.

Now there's just one more unknown to find, the side c. To find the remaining missing side of a triangle, you can use a different pair of ratios to solve, the equation with the rightmost two ratios: sin(34)/14 = sin(110)/c. In general, to solve for one of the unknowns, use the ratio that has what you want to find in it, as the only unknown, and set it equal to a ratio where you know everything already, and you will get the answer. We cross-multiply to get c*sin(34) = 14sin(110). When we get c alone and use a calculator, we find that side length c is approx. 23.53. Now we've completely solved the triangle for all the missing sides and angles.

How do you know WHEN to use the LAW of SINES? If you're given two angles and a side (AAS or ASA cases), or two sides and an angle opposite one of those sides (SSA), you can use the Law of Sines property. If you have two angles and one side (AAS/ASA), you can use the Law of Sines just as we did to find the missing sides. WARNING: for the SSA case, when you have two sides and an angle that's opposite one of them, you can also use the Law of Sines to solve, but instead of having one solution, there may be no solution or two solutions. The SSA case is also called the "ambiguous case".

For more triangle solver math help as well as videos with trig identities, trigonometry problems, geometry, algebra, algebra 2, and calculus, check out:

Editor: Miriam Nielsen of zentouro @zentouro

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  • Raouf Allani 3 years ago

    Thank you teacher excellent Lesson Math _ Sines in trigonometry – RAOUF

  • Whitney 3 years ago

    triangles are nothing but deflated squares

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      Excuse me

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      My thought exactly! Trig time!

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    I Love you Nancy! Thank you for being an INCREDIBLE math teacher. I’ve been watching your video’s for years to refresh math concepts

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    Thank you

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    You are a lifesaver during quarantine

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    Why teachers don’t explain like this at the schools? Why? Thanks Nanci!

    • Gamil 3 years ago

      They did the same thing. But we were confused, not really focused in it. And he took an entire hour for that. ๐Ÿ™„๐Ÿคฃ Thanks Nancy

  • Math and Logic 3 years ago

    I bet I know what’s coming next! Clearly it will be a video on the law of tangents.

  • Aaron Delgado 3 years ago

    I knew this stuff because after all, I am a professor of mathematics. Despite having watched many of her videos, I am still attempting to figure out how she writes on a seemingly transparent board that’s facing the camera and she’s behind it. Does anyone have theories as to how this is possible?

  • DevilsHand676 3 years ago

    Nancy youre back! where have you been my calc grades have been slipping

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    Safe return ๐ŸŒฌ

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    2016, what do you effing want?

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    I may have seen this somewhere before. But now I understand it.

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    Lmao how does anyone actually learn any math lol

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      I can help you. Anyone can!

    • Blaide S. Connor 3 years ago

      @Greg Bell I was just saying it can be distracting because of her looks ๐Ÿ˜‚

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    Mam plz make a series on numerical methods………… plz plz plz

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    Your Channel is awesome. Wish I had professors that explained stuff like this when I was taking Calculus.

  • Francisco Marconi 3 years ago

    Nice calm explanations. I suggest do not speed up the video when start writing, it’ a little confusing

  • Oliver Blue 3 years ago


  • Abdullah Sajid 3 years ago

    Welcome back

  • alfonso_english 3 years ago

    Hola Nancy, es grandioso que hayas subido un nuevo vรญdeo, tus explicaciones son muy claras pero tu sonrisa me distrae. Hi Nancy, it is great that you have uploaded a new video, your explanations are very clear but your smile distracts me.

  • Bill Endy 3 years ago

    First video in six months, did you make parole?

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    You welcome back!

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    • Sui Star 3 years ago

      Sorry its love

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    So glad to see you back!

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    Hey can you make a video on principal equations

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  • A B I O U 3 years ago


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    Nancy is back ๐Ÿฅบ

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    Glad to have you back!

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    I love math. I really, really, reeeeeally love math.

  • zazoomatt 3 years ago

    I found you wanting to review Trig I have not used in 30 years. Then I stroked 4years ago but remembered how much I loved Trig thru engineering. I still remember 90% of it just with out CAD (use of). I want to say how nice it is learning from you…….

  • Optimus Phoenix Prime 3 years ago

    Multiply by
    . ๐Ÿ‘ธ
    โคโค both sides and be reciprocal

  • Dawn Ed 3 years ago

    Do a livestream session! Would like the Queen of Maths to be my temporary teacher during quarantine๐Ÿคฉ๐Ÿ˜Š

  • MD. Talha Ibn Basher 3 years ago

    Nancy where were you?? You launched a video after so many days

  • Arindam Phatowali 3 years ago

    Long long time……..

  • Cbse Maths Tutorial 3 years ago

    Wow nice to glad to see you after long time….. Thank you ๐Ÿ˜๐Ÿ˜๐Ÿ˜๐Ÿ˜๐Ÿ˜

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    Beauty and brains! You are

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    Sheโ€™s back!!! Thank goodness!!

  • Abhranil Roy Roy 3 years ago

    Welcome back Nancy

  • MATH life 3 years ago

    love u mam

  • Yaad Rakhenge 3 years ago

    We need teacher like you in India.
    Shaanti se padhai hoygi.. just calmmm relax and…

  • Phil Peko 3 years ago

    Hello Nancy (& Maths Learners, Lovers & Experts). I thank you for this piece of Maths, and glad to see you still use your great MathTeaching Style. KUTGW !

  • Alfonso Neil Jimenez Casallas 3 years ago

    You came back, Nancy! ๐Ÿ˜

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    Please upload videos soon mam from Ansheshwallah

  • เถ†เถšเท“เถฝเทŠ AWM 3 years ago

    after long time. happy

  • Hector Hiram Miranda Flores 3 years ago

    5:20 “Seems like a garbage idea to me” best part hahahaha

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      Mi loco no se Inglรฉs pero quede encantado con ella

  • Sarveshwar Kohale 3 years ago

    Mate, where have you been? Anyways, great to see you back

  • said amagui 3 years ago

    Thank you Nancy pi

  • Mortizul 3 years ago

    Beautiful ice queen.

  • Gav Mix Tv 3 years ago

    Hi’ Nancy your back! I like this vedio, it’s remind me when I was studying during my college,.love this math subject,.thanks for sharing,.

  • 1Me 3 years ago

    I could write.. like this, but then, I might sound… like, you ๐Ÿ™‚

  • DRIVING_PLATYPUS 3 years ago

    I’m not gonna lie to you Nancy but it’s a little bit late for this now ๐Ÿ˜‚๐Ÿ˜‚

  • Hank Chinaski 3 years ago

    So what did people do before calculators?

  • Charles Says 3 years ago

    NancyPi is like the = sign in our equations, she helps us solve our problems in life. Life/<3=math(NancyPi)<--watch her videos to solve this equation.

  • Lizard-Truth 3 years ago

    Wow it’s Nancy! Glad you’re alive. Nice video keep it up!

  • Ahmed Adwan 3 years ago

    good to see you again,

  • Thom Poz 3 years ago

    Ah, okay, she’s back. All good then.

  • Matthew McCool 3 years ago

    Was scrolling through recommendations, saw the thumbnail and it brought me back to freshman year in College trig. Just wanted to say thank you for all the help your videos have given me throughout my college classes! Iโ€™m not sure I wouldโ€™ve made it through all the math classes without it.

  • poiuh34 3 years ago

    Omg this is hot to watch

  • James Parlane 3 years ago

    Would it help to find the sin. of each angle so then you can deal with numbers in the equation and then divide things.

  • nstsgr 3 years ago


  • Deepak Desai 3 years ago

    Hay there !! Its a pleasure to see you after long time. Just to see you is also pushing adrenaline in body , you are incarnation of titanese the Goddess of wisdom

  • James Parlane 3 years ago

    This could be useful when installing air-conditioning. You can easily calculate the angle of the fandangle for optimum efficiency. OR as Burton Cummings once said, “baby, if you got the curves, I got the angles.

  • Vincent Dufour 3 years ago

    Great video and clear as ever! Thanks for sharing, cheers!

  • RJ Onyx Moonshadow, The Spiritual Cosmologist 3 years ago

    Hey Nancy! Please check your Twitter. I sent you a tweet about collaborating. ๐Ÿ™‚


  • Khรกch Truong 3 years ago

    Verry good. Thank you teacher lovely ๐Ÿ˜๐Ÿ˜˜๐Ÿ˜

  • Serena Nightingale 3 years ago


  • Serena Nightingale 3 years ago

    Nancy can you please put Cosine rule on your list for videos please? It would be very much appreciated โค๏ธโค๏ธโค๏ธ๐Ÿ™

  • Abir Almoznino 3 years ago

    Can you do a vid on trig identities double angle and half angle identities as well?

  • Nada So 3 years ago

    Hi Nancy, We missed you so so so….. much

  • Anonymous Aka 3 years ago

    Yayyy our faourite teacher is back

  • Anonymous Aka 3 years ago

    If beauty with brain had a face

  • T Tony 3 years ago

    Welcome back๐Ÿ˜๐Ÿ˜๐Ÿ˜

  • Mr Malik 3 years ago

    I think you would not make a video again.

  • ู…ุญู…ุฏ ููŠุตู„ 3 years ago

    Stay at home and give us more videos , thank you

  • Daniel Teye Huago 3 years ago

    Nancy Pi where have been… it has been a long time

  • Robert 3 years ago

    Thank you Nancy, we are actually doing this THIS WEEK at Uni. Great to see you again and love the humour, hope for more soon in COVID times ๐Ÿ˜€ love from Australia

  • Agriculture Guide And Livestock Breeding 3 years ago

    Good lecture for deliver

  • Klingende Mynt 3 years ago

    Sheโ€™s back!

  • Atheer alenazi 3 years ago

    ๐Ÿ˜ซโ™ฅ๏ธโ™ฅ๏ธโ™ฅ๏ธNancy we missed u so much

  • Sooraj Singh 3 years ago

    Was waiting for you from a long time

  • Paisley Gray 3 years ago

    You are a God among mere mortals!

  • pin pon 3 years ago

    Hey Nancy, I just passed my last math class (calc 2) and I just wanna thank you so much for all the help.

  • Amadeus Akreveus 3 years ago

    Queen is back!

  • Dlshad Sdiq Xoshnaw 3 years ago

    Hi Nancy welcome back
    Iam math teacher from iraq
    Can you help me
    About your glass board
    And you studio
    Best wishes

  • Naqib Naderi 3 years ago

    I just love โค๏ธ you Nancy

  • Zin tepest 3 years ago

    All my skipped lectures ended up here XD. You saved my high school math classess! Ty

  • Chosen 3 years ago

    My Teachers this Quarantine period:
    – Mathematics: NancyPi
    – English: English with Lucy

    • runze wei 3 years ago

      I love to learn English with Trump. He is funny and I really learn things

    • paulo costa 3 years ago

      Same here!!!

    • Haardik Butola 3 years ago

      Woahhh wtf bro so same!!!

    • Jordan Vargas 3 years ago

      -Psychology: Jordan Peterson
      -Physics: Fermilab

    • Chris Smith 3 years ago


  • Stephen Kormanyos 3 years ago

    So good to see you back! I took calculus through differential equations in college 35 years ago and promptly stopped studying math when I started Medical School. For quite a while I have been rediscovering the beauty of math by re-learning the calculus, but occasionally stumble upon a huge gap in my memory of some basic concept once second nature to me all those years ago. This upsets me greatlyโ€”but when you happen to address the concept in one of your videos, your calm assuredness and straightforward presentations are so much appreciated. You are a superb teacher which in my line of work which is Medicine is the greatest complement I have to offer. Thank you again for the videos and welcome back. Steve K.

  • romio lover 3 years ago

    Hi Nancy i missed you a lot and i’am glad to see you again ๐Ÿ™‚

  • Jack R 3 years ago

    Always a great explanation, good to see you are back.

  • Sean Nombo 3 years ago

    Thanks for posting videos again
    We missed you

  • Sohail Javed abbasi 3 years ago

    You are so cute nancy.nice vodeo

  • Jakob Ye 3 years ago

    hallo NancyPi, i am relly enjoying your mini-lectures. If it is possible, could you explain more regarding the theory of differential equation? I will appreciate for that.

  • Nozim Umatillayev 3 years ago

    Your teaching is just awesome,well come back

  • Brandon Gonzalez 3 years ago

    I love the humor you’ve been letting into these new videos! You’ve really kicked the editing up a notch too. You haven’t aged a day either, fyi!

  • Lex Luthor 3 years ago

    I don’t have maths, yet here I am!

  • Jackson 3 years ago

    Damn damn damn, math.

  • silverbird58 3 years ago

    what is the theatan of that heart thingy?

  • Homemade Mathematics 3 years ago

    LOVED THIS VIDEO NANCY! You have inspired me to create my OWN channel which I will be creating videos covering topics in 6th-12th grade math. So far I have two math card games, and a series on integers, but have high school content planned for later this week. I am SUPER excited about my video going up tomorrow, which I think will make math fun for A LOT of people! I will be posting 3 videos a week and I would LOVE if you checked out my channel ๐Ÿ™‚

    • allan donahue 3 years ago

      I have watched tons of Nancyโ€™s videos and that has led me to the Homemade Mathematics page which has opened up a whole new batch of content ๐Ÿฅณ๐Ÿคฏ๐Ÿคฏ

    • allan donahue 3 years ago

      Homemade Mathematics Love your videos! Keep up the great work!

    • Homemade Mathematics 3 years ago

      @allan donahue Thank you so much! I will! New videos every Monday, Wednesday and Friday!! ๐Ÿ™‚

    • allan donahue 3 years ago

      Homemade Mathematics Awesome! LETS GOOOO!

    • Hammad Sirhindi 3 years ago

      Any link of your channel?

  • Frank flers 3 years ago

    Nancy pie is back ๐Ÿ˜๐Ÿ˜๐Ÿ˜๐Ÿ˜๐Ÿ˜โค๏ธ๐Ÿ’•๐Ÿ’•๐Ÿ’•โค๏ธโค๏ธโค๏ธ๐Ÿ’•๐Ÿ’•

  • Dรญaz 3 years ago

    7:42 I loved that subtle sarcastic comment. <3

  • Cahal Queue 3 years ago

    that’s so great you are back

  • Adriano Vasconcelos 3 years ago

    Glad you’re back.

  • Thomas Tsai 3 years ago

    OMG!! you’re back!! <3

    • Thomas Tsai 3 years ago

      Now I can get a good sleep! ^^

  • vellanki saichandra 3 years ago

    man i missed your beautiful face …welcome back madam

  • vellanki saichandra 3 years ago

    you look ravishing than before…

    • Sami Deshpande 3 years ago

      Darling he

  • vellanki saichandra 3 years ago

    I can’t describe my happiness, I was upset knowing you stopped releasing/ posting content to youtube.

  • ฤžรขmรฉล™ ลฤ•รฑฤŸรชรฑฤ‘ 3 years ago

    we are so happy cause your back๐Ÿ˜‡๐Ÿ˜‡

  • abdullah evazi 3 years ago

    Thanks for the great video

  • I malik 3 years ago

    you helped me pass calc. thank you nancy

  • John Kunai 3 years ago


  • Hdxj L 3 years ago

    Can you do one on laws of cosines

  • lqnaetix 3 years ago

    welcome back queen

  • sgedeon01 3 years ago

    Hi Nancy
    Welcome back. Keep up the great work

  • Joaquin Navarro 3 years ago

    Fans Only ?

  • vrendus522 3 years ago

    Thanks, like your new sereis. Your’e not so intense now and a little more relaxed. When you started out, I was super paranoid of you, as In a former existence in another star system, I was a highly placed official. A type of general. They made a clone that was a killer, betrayer, and how you would tell these part from normal people, is they had no nivea’s on their bodies. So I looked and looked for a beauty spot on you and found one. When I did, I could finally relax. Good sereis. You take the difficult in math making it more than one dimension and therefore digestable. Thank you, wish you continued success.

  • Jawad Larjouni 3 years ago

    Ah! Finally you’re back

  • Astro Tacos 3 years ago

    NancyPi? More like cutiePi. Keep up the good work!

  • David Ivey 3 years ago

    Yeah, so glad to see a new post!

  • Eleazar The Believer 3 years ago

    Is this old recording? Plzz tell idol

  • bob 3 years ago

    You mean: Angle Side Side (bless you, Mrs. Reordan, wherever you are)

  • Sam L 3 years ago

    How did you know that I needed this????

  • ุฃูƒุงุฏูŠู…ูŠุฉ ุณุนูŠุฏ ุงู„ุดู„ูˆูŠ 3 years ago

    What kind of pens are used in the explanation?

  • SAAD ALSHEMRANI 3 years ago


  • MJn6 2_22 3 years ago

    This women soo beauty ๐Ÿ˜ญ๐Ÿ˜ญ๐Ÿ’•๐Ÿ”ฅ

  • Brand7on 3 years ago

    Our math queen is back<3

  • Francky48 3 years ago

    I’m guessing Law of Cosines video is next?, I can’t wait!!!

  • Das Wunder 3 years ago

    what play list belongs this videos

  • Just1Guy Metalworks 3 years ago


  • Kartik sharma 3 years ago

    Mam i am from India thanks ๐Ÿ˜Š

  • Alek White 3 years ago

    Great video Nancy! Welcome back! Please more videos like these.

  • Bo Rerun 3 years ago

    I learn so much , thanks

  • Twotoes Thecurmudgeon 3 years ago

    Is a series on Linear Algebra on the horizon or Diff Equations?

  • Emanuel Guadamuz 3 years ago

    Law of Sirensโค๏ธ … Would you make a list of Differential Equations? Please. Is so gratificant tรญo learn with you.

  • Mischief Managed 3 years ago

    We’ve missed you! So happy to see you doing the maths!

  • Pranshu Mathur 3 years ago

    Long time For a Break….But i am still glad u are back:))

  • Three Stacks 3 years ago

    Yo Nancy, can you make a vid on significant figures please?

  • Yishar Kriswandono 3 years ago

    You are a real head turner !!

  • Ramanjaneyulu mareedu 3 years ago

    Iam so happy to watch your lecture thank you so much

  • Alexander Quilty 3 years ago

    She should talk about calc 3! ๐Ÿ˜‚๐Ÿ˜‚

  • juntao11 3 years ago

    How do you find reciprocals for fractions??

  • Conifer Viveur 3 years ago

    Superlative explanation.

  • NeV Miku 3 years ago

    She is alive!

  • Arturo Garza 3 years ago

    So sexy Nancy. ๐Ÿ˜š

  • TheProphesizedWalnut 3 years ago

    Yeeees! Best news of 2020 yet!

  • MaTH - Math Tutorials by Harpreet 3 years ago

    Love your videos Nancy… As a math teacher, i started creating videos for my students during Quarantine, so a newbie to youtube…. I am still wondering how do you create your videos ?

  • Ahmad Ghalawinji 3 years ago

    How could I focus on math with such a beauty in the video๐Ÿ˜‚๐Ÿ˜…

  • Yifu Li 3 years ago

    I love you

  • Eric Barger 3 years ago

    Do you take request? I have a problem you could teach how to solve that would be good for engineering students to know.

  • pcfxr4u 3 years ago

    Hi Nancy,
    Can you show me the math that allows you to have stopped the ageing process?
    Your face and skin are apparently not following the mathematical norms of getting older.
    You’re not only a great mathematician, but a rather attractive one to boot.
    Which reminds me of a famous quote, “To boot or not to boot, that is the hardest drive.”

    Just saying,


  • Daimler Perreras 3 years ago

    My favorite math tutor

  • Aki Bandwich 3 years ago

    Its hard to study bcuz I’m sinking in your eyes ..

  • Geroge Jackson 3 years ago

    if u taught finance and economics I would get a distinction

  • Pointer 3 years ago

    I don’t like math. I just watch your video because I like to.

  • Neo 3 years ago

    Even though math is my favourite subject and I’m good at it, for some reason I’m binge-watching her videos lol. Hope you’ll do Law of Cosines soon <3

  • Suraj Sapra 3 years ago

    Hey nancy.
    Please make a vid on second order derivatives…

  • Haim Ben Avraham 3 years ago

    Nice to see you. To see you nice.

  • Robert Osterman 3 years ago

    On behalf of my students trying to work through the Law of Sines during the “at home learning” portion of this very interesting school year, I want to say thank you for the excellent tutorial on what is often a confusing topic. I hope that more students can appreciate the work into creating these videos and take advantage of them, and others, to help support their education in the information age. – @Osterclass

  • Wen Sim 3 years ago

    Yay! you so awsome, we missed you.

  • Math with Sami 3 years ago

    Great video nancy.

  • j0786n 3 years ago

    Hi Nancy. If I know all three angles of a triangle there will be infinite number of triangles. Correct?

  • Navya Shah 3 years ago

    I think your videos are truly helpful and have helped me learn concepts better and I cannot thank you enough for that. It would be really nice if you explained the topic of quadratic equations because that is what I am doing in my school right now and I- have no idea what I am learning. I find your teaching style quite comfortable and would appreciate it if you considered quadratics as a tutorial.

  • Jeff Graf 3 years ago

    Hi Nancy Have you done anything with applications of the Fourier transform?
    I am particularly interested in holography and lens less microscopy.

    • Jeff Graf 3 years ago

      Did you know that a hologram is a 2D Fourier transform? To view it you do the same transform. did you know that computers can do the transform now?

  • Joshua 3 years ago

    Thanks for your help

  • Dheeraj Kumar 3 years ago

    God bless u. Nice vedio

  • DAVID DJJD OLAVARR 3 years ago


  • Egg 3 years ago


  • Voss 3 years ago

    this made my life YOU’RE BACK

  • Jorge Yumiseba 3 years ago

    I watched the whole video… I’m not even in school anymore

  • Rohit Suryarao 3 years ago

    How are you making your hand movements. I mean your writing on the screen on your front side & still we are watching it without mirror effect.

  • ู…ุญุฌูˆุจ ูˆุฏู‚ุฑุดูŠุฉ 3 years ago

    Thank you so much

  • Douglas Dorman 3 years ago

    is it me.. but there is no way I could learn any math from her.. not an indictment on her.. I am too superficial

  • Karles McQuade 3 years ago

    So, do you like, own a ballet studio? That’s the only place I can think of that…oh, nevermind. But that is truly some Chris Nolan-level cinematography.

  • Ruth Lenny 3 years ago

    You’re back! ๐Ÿ˜„

  • chrome13 3 years ago

    Thank you so much. I love math but I have been out of school for too long so this is very refreshing.

  • ComSciNerd 3 years ago

    I thought you stopped making videos! I used your channel so much when I was teaching myself calc to prepare for college. Love your channel!

  • ErxMC 3 years ago

    Long time no see!

  • A. Jel 3 years ago

    OMG wait if we all put in like a few dollars each month to NancyPiโ€™s Patreon she could just stop whatever and only make videos for us everyday! and then everything will be ok and the world becomes better place forever

  • Rodrigo Gomes 3 years ago

    Com essa professora eu consigo aprender rรกpido sobre duas coisas que eu nรฃo compreendo absolutamente nada: falar inglรชs e matemรกtica.

  • Fatima Hussain 3 years ago

    First time I see a pretty math teacher๐Ÿ˜

  • Bash 3 years ago

    Thanks for being back
    Really helpfull….

  • Abulfaz Ibrahimov 3 years ago

    ๐Ÿ‘.From Turkey

  • Ivandro IG Jao 3 years ago

    Yeeeeeeeee u back

  • CMDR Bobert 3 years ago

    Excellent, thanks for another fantastic video. It really has helped me out. I would love to see you do one on partial fractions, Eigenvectors/values, and functions of two variables.

  • Maths with Muneer 3 years ago

    Respect โค๏ธ

  • CHINGARI . BE INDIAN 3 years ago

    Great love from India ๐Ÿ‡ฎ๐Ÿ‡ณ๐Ÿ’–๐Ÿ‡ฎ๐Ÿ‡ณ

  • Utkarsh Verma 3 years ago

    Please upload more often ma’am. Please make a series on India’s NCERT curriculum if you can. You’d get millions of viewers. Indian students need you! ๐Ÿ™

  • KuCH Bh! Hack 3 years ago

    I already know all this, but still watch your videos because you are cute

  • Erdem Berke Akyฤฑldฤฑrฤฑm 3 years ago

    Thank you for your help. โ˜บ I do love you my teacher. โค

  • Arnab Chatterjee 3 years ago

    Great to see from you after a long time.It would be great if you cover euclidean geometry for math olympiads.

  • Guillermo Chavez 3 years ago

    Trying my best to pay attention but I get distracted.

  • Achilles Turner 3 years ago

    Yo does she got a insta! I need help with math

  • Frend zoon 3 years ago

    omg her voice is amazing…

  • maanu sahu 3 years ago

    Your video is so nice mam…
    Love from India.๐Ÿ˜‡๐Ÿ˜‡๐Ÿ˜‡

  • Fernando Gonzales Villavicencio 3 years ago

    I’d like to keep the clockwise form , the Angle Side Side

  • Raj Farakh 3 years ago

    oh thank god your back, i was scared id have to actually attend lectures

  • Andrew Zanoni 3 years ago

    Nancy thank you for all the help you are doing for students over break who are struggling. Would it be possible for you to make a short video on lโ€™hรดpitals rule. That would be great. Thank you.

  • ramo tnarg 3 years ago

    Your videos are awesome. Keep up the good work. I can’t help but wonder , what do you do to make your writing so clear. What cameras do you use? How do you capture your voice?

  • GreenPenRedPen 3 years ago

    nice video, i am also a mathematician, can you tell me that which software you are using in your videos

  • Shivam Gupta 3 years ago

    It’s soo refreshing to see u

  • THE UNKNOWN SYSTEM 3 years ago

    You have come back !!!

  • Ather Radwi 3 years ago

    Yey…. your back Nancy-pi …….. not a math person but thereโ€™s always something one can learn from a talented educator plus your sweet presence ๐Ÿ™‚

  • ZapsterZatoo 3 years ago

    You are smart and beautiful

  • S H 3 years ago

    Marry me plz. ๐Ÿ™ ๐Ÿ™ ๐Ÿ™

  • icesrd 3 years ago

    Great to see you!!! Hope all is well. Ready to have you back full time.

  • Pahanin 3 years ago

    She writes it all backwards left handed!

  • Kadir Gokhan 3 years ago

    ya abiii nerdesin geliyim buliyim seni ya

  • Kadir Gokhan 3 years ago

    The best side of having known english is YOUUUU

  • Atharva Purohit 3 years ago

    ok i’ll say it…*writing backwards is more impressive than actually doing maths*

    • OD now 3 years ago

      I didnt notice that at the beginin…
      Something is up

    • OD now 3 years ago

      Must be a mirror app thgh

  • Albert Batfinder 3 years ago

    NancyPi is the best.

  • The Learning Academy 3 years ago

    after long time you uploaded a video

  • filmATOR98 3 years ago

    everyone asking how she writes backwards, no one wondering how she talks from behind the glass

  • Chanse Syres 3 years ago

    Yay, you’re back!

  • Syahrizal Guru Freelance 3 years ago


  • KAVEN SAGAR 3 years ago

    I love u. U r awesome

  • Bidisa Acharjee 3 years ago

    Please mey what board you use to write.

  • Paul Taylor 3 years ago

    Glad you’re back on and posting videos again!

  • Bhupi dahiya 3 years ago

    What she is using for writing.can anybody tell me pls. Is it any app or software?

  • Advent Tutorial Maths 3 years ago

    Mam i am also a teacher and it will be a great help if you let me know the application you use for such kind of video interaction. ..๐Ÿ˜Š

  • Mehtab Munwar Academy 2 3 years ago

    Nice lecture

  • Abhishek kumar 3 years ago

    from where you are mam

  • Diego Llamas 3 years ago

    dont stop making videos you make more sense than my professor

  • neerja mv 3 years ago

    U r very pretty sis

  • Altaf Hossain 3 years ago

    please make some classes on integral calculus!!!!!!๐Ÿ˜•๐Ÿ˜•๐Ÿ˜•๐Ÿ˜•๐Ÿ˜•๐Ÿ˜•

  • Karl Slender 3 years ago

    Great to see you back Nancy. Hope to see more videos soon. You’re a fantastic educator.

  • Aonso Ng 3 years ago

    Can u teach applications of differentiation?

  • Saad Shahzada 3 years ago

    I want to use LOVe Sign on u . how u write this ? please tell me

  • Rajat vipraj 3 years ago

    well another video comes after that corno ends i guess๐Ÿ˜‚๐Ÿ˜‚๐Ÿ˜‚

  • Phillip McCary III 3 years ago

    I am Happy to see you back in action! Thank you,

  • Smoke Giver 3 years ago

    Sheโ€™s back yessirrr

  • Jakob Roth 3 years ago

    What did you major in at MIT ?

  • Gary Ward 3 years ago

    It would be nice to show a proof for the Law of Sines.

  • Sadaf Jahan 3 years ago


  • Behind the universe 3 years ago

    You voice is so cute

  • Dawie Sutton 3 years ago

    yay, you’re back, have missed the knowledge that you’re willing to shear.
    Your vids helped me get through Engineering Degree Maths.
    kai mihi, te hauora pai, kia kaha

  • I am the hope of the Universe 3 years ago

    I can’t focus,. Help me!!!!!

  • Atul misra 3 years ago

    i can solve it with two methord …

  • Atul misra 3 years ago

    low of sine….

  • Joel Lau 3 years ago

    ms nancy pi happy teacher’s day

  • batu erdoฤŸan 3 years ago

    hocam at gibisiniz maลŸallah

  • richter umali 3 years ago

    Are you even real?

  • Romantic Bollywood 3 years ago


  • Jashan Pal Singh Sethi 3 years ago

    Can you make vedios for jee mains

  • Ashish rai 3 years ago

    You are so hot and sexy

  • Abbas Ali 3 years ago

    So, Are you married now ?

  • Chewy Samurai 3 years ago

    I just love the title of ur videos! ๐Ÿ˜‚

  • Shirazi Ahmed Sheikh 3 years ago

    Thank Ma’am ๐Ÿ˜Š

  • Hooman st 3 years ago

    I’m not here to learn the Law of Sines if you know what I mean!

  • KABANDA JAMILU 3 years ago

    I like 10000 times how u explain my world best

  • Artheleoxd 3 years ago

    No se que dice por que no entiendo el Inglรฉs JAJAJAJAJA pero, Galileo Galilei decia: “Las matemรกticas es un idioma universal” se puede ver video en otro idioma y entiendes perfectamente. Ya conozco estos temas, pero me los verรฉ todos por que se hizo mi crush la del vรญdeo

  • John Hoens 3 years ago

    Where were you? Nice to see you back!

  • A2z world 3 years ago

    I am studying from India good teacher

  • Sona Sunny 3 years ago

    could you please please do more videos….i missed your classes..i’m a huge fan and you are a life saver.

  • Daryl Trawick 3 years ago

    Me likie

  • khalid Mequaoui 3 years ago

    ยฟCan’t be subtitled with other languages?

  • Chandan Kumar 3 years ago

    Upload videos on vector algebra

  • Chandan Kumar 3 years ago

    You might not like maths, but you can like my videos and subscribe.

    Done. ๐Ÿ‘

  • Ash Lele 3 years ago

    Thank you Nancy love from Africa ๐ŸŒŽ

  • ittotaq 3 years ago

    holy crap i thought this channel went defunct. GLAD TO SEE YOU BACK NANCY

  • Glenn. Grispen 3 years ago

    Beauty with brains. ๐Ÿฅฐ

  • AYAAN ASIR AHAMED 3 years ago

    MAM in such situation you are our support keep uploading videos and stay safe

  • boredgrass 3 years ago

    Delighted to see you! How are you doing? I wish you all the best! PS:…The words “Don’t panic.” coming from a mathematician is a bit alarming….;-) Though, that it is spoken with one of the most reassuring and calm voices I know, helps a lot!

  • Shaheen Sultana 3 years ago

    Love u Lucy my best teacher want your more beautiful videos like you

  • Help Online 3 years ago

    Your channel is very beautifulโ˜บ.
    We also have a math channel in Spanish๐Ÿ˜‰๐Ÿ˜‰. What kind of blackboard do you use so that people can see you and what you write?

  • Abhishek Sahoo 3 years ago

    Upload full video of properties of โˆ†

  • Suneesh SS 3 years ago

    Is she real or is it a robot?

  • Petrus Paty 3 years ago

    I like Math. Join me. Thanks. New friend.

  • Zahi malik 3 years ago

    Can we chat,dear

  • ุดุฑูˆุฏู†ุฌุฑ 3 years ago

    WITH THANKS. โ˜บ

  • Terry Cho 3 years ago

    i don’t like math or your videos

    i like you
    (jk your videos are awesome! sometimes, i have dreams about you being my math teacher; i never skip class <3)

  • ja ja 3 years ago

    nice video

  • เฆ•เฆค ,เฆ•เฆฟ, เฆ•เง‹เฆจ, เฆ•เง‡เฆจเง‡เฆ•เงˆ 3 years ago

    You’re such a fucking beautiful…

  • srikant prasad 3 years ago

    Nice tutorial ma’am, how you create this tutorial. Please say about this.

  • Dwit Beathead 3 years ago

    Nancy pi a qt3.14

  • impromptu24 3 years ago

    ๐Ÿ˜ช๐Ÿ˜ช๐Ÿ˜ช๐Ÿ˜ด๐Ÿ˜ด๐Ÿ˜ด๐Ÿ˜ด๐Ÿ˜ด๐Ÿ˜ด๐Ÿ˜ด thumbs down

  • AJAY SINGH 3 years ago

    Thanks for the informative videos. Easily understandable. Will you make similar videos for cosines, tangent, secant, cosecant, cotangent?

  • ู…ู‡ู†ุฏ ุฏุฎูŠู„ ุญู…ุฏูŠ ุญู…ุฏ 3 years ago

    How can you write it that way?

  • Robert Callaghan 3 years ago

    who knew math was so hot

  • Jonathan Lopez 3 years ago

    Wish u were my math teacher and smooth with the like

  • adrian lalo 3 years ago

    if u need a bf look no further ๐Ÿ˜‰ slide my Dm’s

  • John Hoens 3 years ago

    I would love to see your take on solving some of these so-called ‘Viral’ math problems running around Facebook these days like 6 / 2(1 + 2). They create arguments that go on for days. There’s another one with Horses, Horseshoes and boots. It’s a set of Simultaneous equations. Yet arguments ensue… Your thoughts? Thanks!

  • Gideon h 3 years ago

    can you please do videos on computer science or something related please!

  • Sunil Agarwal 3 years ago

    Looking very ๐Ÿ˜„๐Ÿ‘๐Ÿ‘๐Ÿ‘

  • Sunil Agarwal 3 years ago


  • Roni Matemรกtica 3 years ago

    Perfeito! The best teacher, I liked it here in Brazil!

  • avi budha 3 years ago

    only once in 6 months๐Ÿ˜ข

  • johnkim7905 3 years ago

    Tbh i was only watching her the entire time

  • mario hernandez 3 years ago


  • Shubham Patel 3 years ago


  • Learn with Deepika 3 years ago

    Your lectures are a treat to my eyes.

  • Learn with Deepika 3 years ago


  • Nรฉstor Avalos 3 years ago

    No la entiendo del todo pero es hermosa.

  • yahia mathteacher 3 years ago

    Nice and amazing

  • ๆŸณๅฒ‘็„‰ 3 years ago


  • Zen 3 years ago

    Just here to say Thank you because I passed Algebra 2 with a B.. but uh haha Iโ€™m free Friday night.

  • Chemin de la rรฉussite 3 years ago

    Good video ๐Ÿ‘Œi like it ๐Ÿ’ฏ๐Ÿ‘

  • Jordan Vargas 3 years ago

    This video reminded me that I need to look for how to solve SSS which is law of cosines. Thank you so much and I’m glad I just discovered your channel.

  • ุฃุณุชุงุฐ ู…ุนู…ุฑ ูƒู…ุงู„ ุงู„ุฏูŠู† 3 years ago

    My name is Muammar Kamal
    I am Iraqi Math teacher

  • The Scholar Mind 3 years ago

    You are so beautiful and prettier , thanks for video

  • Philo Mathic 3 years ago


  • Toprak Soil 3 years ago

    expontial how can calculated can you understood

  • MathIsLife: Dr. Satbir Malhi 3 years ago


  • anil kumar 3 years ago

    Are you satisfy why unit circle don’t have unit area but still it satisfy all the conditions of math and physics and so on ,but if we take 1/โˆšฯ€. as radius of circle and it’s still satisfied all the trigonometry conditions ????

  • anil kumar 3 years ago

    Use the bhagwati shakti trikon

  • anil kumar 3 years ago

    How I talk with you

  • Dennis Doane 3 years ago

    I noticed you are left handed ๐Ÿ™‚ You are also an excellent teacher. I wish you would have been around when I was taking differential equations ! Have a blessed day

  • ANA MARIA OLARTE CALDERON-Alumno 3 years ago

    I was really waiting for this video

  • Yohannes Nurga 3 years ago

    Welcome back Nancy!

  • Abhishek Mishra 3 years ago

    Perfect combination Beauty+intelligence=Nancy

  • Mohammedalbaqer Alghizi 3 years ago

    I watch your video eve though I know all these stuff!!

  • The Temple of Maths - Bapuji Pullepu 3 years ago


  • Paulo Z 3 years ago


  • David H Haindongo 3 years ago

    Hi Nancy! Can you please make videos on Sets

  • Hamza SQ 3 years ago

    How does she writes in inverted/mirror?

  • Pietro De Nicola 3 years ago

    You are great and your videos really useful! But honestly, I’m glad that the teenager version of myself didn’t study with a teacher like you but with the fleshless books. I could focus just the math ; )
    I wonder, does people here notice the great work you’ve been doing to realize these simple, concise, yet thorough explanations? And did anybody realize that the video must have been flipped horizontally, to be read correctly, and that we are seeing the horizontally-reflected version of your figure? Just wondering.

  • Si Reen 3 years ago

    Please make another video about the last case you mentioned

  • Jim Carlson 3 years ago

    Being shady, How mean.

  • Jeffrey Fortman 3 years ago

    I just watched *most* of your q&a from 2018. Has anyone figured out your wizardry? I love to figure such things out. I will only mention that your dominant hand may not be the one it seems to be, and note that inverse and opposite are different transitions. Thank you for what you do here!! ๐Ÿ™‚ Signed, someone who only recently discovered engineering and maths are super exciting after dismissing the subjects for a long time, and whom has pretty much no friends from pre-this interest to talk with about this stuff. Thanks again!!!

  • vivek kumar 3 years ago

    I love you mame

  • BL Blps 3 years ago


  • Aarohi Oberoi 3 years ago


  • Dilkush Meena 3 years ago


  • online study point 3 years ago

    I Love mam aap se pyar kr te haโคโคโคโคโคโคโค๐Ÿ’–๐Ÿ’–๐Ÿ’–๐Ÿ’–๐Ÿ’–๐Ÿ’“๐Ÿ’“๐Ÿ’“๐Ÿ‘„๐Ÿ‘„๐Ÿ‘„

    • study with Rakesh 3 years ago

      Ye hindi janti h dost

    • MSEDCL DISCOM 3 years ago


  • Prajjwal Sharma 3 years ago

    Iam a Btech 2nd year student..and i don’t know what iam doing here..

  • Nobel Peasant 3 years ago

    Yayyyyy, you’re back! ๐Ÿ˜€ Are you enjoying the Covid Apocalypse? I hope all is well in your world. Cheers.

  • samy hofany 3 years ago

    ู„ู‡ุทู‡ ู‚ุดุทู‡

  • G. S KHILADI เค‡เค‚เคกเคฟเคฏเคพ 3 years ago

    Interested vdo

  • D. Van 't Reeve 3 years ago

    so f***ing beautiful, feminine and smart woman?! I can’t believe that!

    • taresy6789pp Pang 3 years ago

      Woman are a complex maths equation complicated lol

  • Ahmed Ayman 3 years ago

    Hello, I demand that this beatiful teacher make an integration by partial fraction, I hope i can see how she would explain it? also liked and subbed though

  • TARGET โ€” PARA COMMANDO. 3 years ago

    Mam you are so beautiful

  • Ismaaciil Jabad 3 years ago

    *Islam is the beuty for all humans specially for womans please read slam coz slam is perfect not muslims—allah(god) ordered for womans to take hijab to cover their beutiful body–this is good for your health and others!!!!!!please read slam!!!!*

  • SHASHI KANT 3 years ago

    Excellent explain ๐Ÿ‘
    Brain with beauty ..

  • J P Mishra Maths Classes 3 years ago

    Very nice explanation ma’am thank you so much you are great

  • Rahul Gupta 3 years ago

    I thi

  • Dinsmore Keir 3 years ago

    Nancy you are a excellent teacher love you very much

  • Khadimul Islam 3 years ago

    I am doing my graduation ..I don’t know why I am here !!

  • im Savage 3 years ago

    Hottest Math teacher on youtube

  • KRONH CHHYTHEAN 3 years ago

    you’re pretty๐Ÿ˜๐Ÿ˜

  • Soupmayy 3 years ago

    I got finals this week and studying during Quarantine was super hard! thank you for your videos

  • Deepak kumar 3 years ago

    Love u mam im from india

  • Juve87 3 years ago

    Please upload regularly

  • ahmed nessim 3 years ago

    so beautiful

  • Jadav Music Studio 3 years ago

    Love it

  • Kapil Dev Sir 3 years ago

    Which board or software u r using to write in such a way?

  • Mr.Akeel Almahmoud 3 years ago

    Hi Nancy what the name of application that you use to flip vedio please tell me send the name

    • Keith Forbes 3 years ago

      there’s lot of programs that can do it, I believe you can flip video with openshot, which is free and open source

  • Robert 3 years ago

    btw law of cosines could have also been nice <3

  • Hope4NewDay 3 years ago

    Quarantine has all the content creators coming back.

  • Hans Quispe 3 years ago

    el tema es muy sencillo ,pero la maestra es muy guapa

  • ๆ˜ฅๆ—ฅ้ฆจ 3 years ago

    You are as beautiful as math.

  • Avinash Jha 3 years ago

    U are so beautiful ๐Ÿ˜๐Ÿ˜

  • Taha Jafari 3 years ago

    Hi. Hi. I would like to start reading math from the beginning ,. How do I fallow the path of mathematics videos

  • Yeric Fonseca 3 years ago

    I can’t learn trigonometry by this way, Not only because She is a beautiful girl also she has soft voice.

  • vigneshwaran Rm 3 years ago

    Aw! back againโค๏ธโœŒ๏ธ

  • Your Channel 3 years ago

    Where were u? I waited so much ๐Ÿ˜ญ๐Ÿ˜‚๐Ÿ˜ญ to

  • taresy6789pp Pang 3 years ago

    I think I pass my numerical test if she was teaching me cute lady omg

  • Pahanin 3 years ago

    Is it me or does she have very long arms

  • zephrein Suleiman pricisely understandable teacher 3 years ago

    Nice tuitor, I admiring you

  • Daniel Medina 3 years ago

    It’s amazing how you write everything backward so it appears right side up,very smart

    • Physics Wisdom 3 years ago

      Just a simple video editing trick. Video is flipped

  • ciodragon 3 years ago

    Why don’t I have a beautiful teacher like you ?

  • KARNIKA CLASSES 3 years ago

    Nice classe

  • KARNIKA CLASSES 3 years ago


  • rohit kumar 3 years ago

    a+โˆšb=7 then prove a=4 and b=9 miss Nancy please solve it

  • Syahrizal Guru Freelance 3 years ago

    Nice,,,common d: come to my YouTube channel

  • Nicholas Uribe 3 years ago

    You should do another Q&A video

  • ijejln fzzdfar 3 years ago

    Non threatening Maths, great!

  • Anderson Goulart 3 years ago

    NancyPi is Very Hot!!!

  • Kristan Douglas 3 years ago

    hi,great videos,canyou helpwiththis In a race the probability that Tom wins is 0.3, the probability that Mathew
    wins is 0.2 and the probability that Jerry wins is 0.4.
    Find the probability that
    (i) Tom or Jerry wins,
    (ii) neither Tom or Mathew wins.
    Assume that there are no dead heats

  • Sรฉrgio Pereira 3 years ago

    Wow! Beautiful teacher. It is never too late to learn.

  • DANIEL LOPES REZER 3 years ago

    ร“timo . Adorei a explanaรงรฃo.

  • matar mbe 3 years ago

    NancyPi I love the wild child is inside you

  • Piano Sonata 3 years ago

    NancyPi, do you have any idea how many want to have the amount of subscribers that you currently do? We wish to see more videos of you explaining things, in ASMR style, as you always do. Teach us arithmetic, simple math things.

  • d0ct0rcolossus 3 years ago

    Yay, welcome back!

  • Alexandre Vitoria 3 years ago

    I am an electrical engineer here in Brazil. I’ve always been passionate about math. But, in love with the teacher is the first time. Thank you for your work.

  • Ryan McGowan 3 years ago

    Thank you for helping me pass my FE exam. -someone that never took college level math. Your videos were my go-to for learning calculus, and I tried at least 3 books, but didn’t get the ah-ha moment until I watched your videos.

  • Vicky Dogra 3 years ago

    WTF! Is she writing on glass from her right to left with flip words? I’m so confused. ๐Ÿ˜ฒ

  • #cross the limit# 3 years ago

    Hello madam ๐Ÿ‘‹

  • AT UL 3 years ago

    how u do this on screen can u please explain it
    i mean writing on the screen

  • Ananda Hanif H 3 years ago

    law of cosines? when?

  • Marcos Paulo 3 years ago

    Muy bueno!

  • Christopher Hunter 3 years ago

    Dang… fine and smart wifey material

  • The Shadowist 3 years ago

    Maths girls are wife material!

  • Hasnaa Al Hussaini 3 years ago

    PLEASE how you are writing (on a screen or a board ) and why it’s not opposite ?

  • dharmendra Singh maurya 3 years ago

    How to calculate valu of sin34

  • Kuldeep Jatav 3 years ago

    I saw you and I gave like

  • Named 3 years ago

    Most attractive woman on YouTube….by far!

  • Himanshu 05022000 3 years ago

    Mam you are very cute๐Ÿ˜๐Ÿ˜๐Ÿ˜๐Ÿ˜๐Ÿ˜

  • Yadav Anil Anal 3 years ago

    Nice method

  • Yadav Anil Anal 3 years ago

    Madam jee rauaa kaha se bani

  • jedifrogmstr Odin-son 3 years ago

    Intelligent and beautiful ๐Ÿ˜๐Ÿ˜

  • Beautiful India 3 years ago

    You made my day…thanks

  • old english clocks 1640 to 1700 3 years ago

    Precious girl! And what a great teacher.

  • carlos augus yo 3 years ago

    Lo ando viendo el la bella cuarentena

  • Paarthurnax 3 years ago

    When did you become an expert in Trigonometry?
    Me: Well, it’s complicated.

  • Ravi AHIR 3 years ago

    I mean u are very tired and stressful lady.
    Level of difficulty is zero in your content.
    In India 5ths class student solve your question s by getter approach!!!
    Jai Hind!!!!!

  • arpit sharma 3 years ago

    which software do you use?

  • Science is fun 3 years ago

    Hey. Hii can i get a video on legendre polynomials . Plz its just a lot of pain.

  • Joker 3 years ago

    No big deal. Trigonometry is very easy. Every mathematician knows.

  • Tarekegne Anteneh 3 years ago

    you aer good teacher thank you

  • rOgEr C.L. 3 years ago

    ยฟNo puedes explicar en espaรฑol?
    En ingles no entiendo.

  • Pinku Mia 3 years ago


  • Geometria e Mรฉtodos 3 years ago

    Professora linda๐Ÿ˜

  • abdul rouf 3 years ago

    Can you please tell which application u r using here to teach
    It will be highly obliged

  • KARIM MERNIZ 3 years ago

    You should make courses on Udemy. I would definitely buy them.

  • VARSHIT ARYA 3 years ago

    Western culture is worst no respect interaction between teacher and students

  • Learning 24*7 เคœเคฟเคฆ เค•เฅ‡ เคธเคพเคฅ เคธเฅ€เค–เฅ‡เค‚เฅค 3 years ago

    Can you provide me editing method like this vedio

  • ุนุจุฏุงู„ู„ู‡ ุชุฑูƒูŠ ุซุงู…ุฑ 3 years ago

    Hi Nancy, I am a teacher from Iraq. What kind of board do you write?

  • Tom Lin 3 years ago

    Teach us how to do Mathematical Induction & Strong Mathematical Induction. <3

  • Andre Lauw 3 years ago

    Now shes ruining my good night sleep ๐Ÿ™

  • MtbMtier 3 years ago

    math=mental abuse to humans

  • phat nguyen 3 years ago

    Wow thรฌ ra lร  ฤ‘ang o chuรดng em bรฉ mat me nhแป‰ hehehe ha ha ha

  • Frijheid& Justitie 3 years ago


  • David Adewumi 3 years ago

    Fantastically delivered in such a simple and lovely manner
    Hope to be like you someday
    Mathematics Teacher from Nigeria

  • Space Comma 3 years ago

    Killer dress, needs a plunging neckline though.

  • aliso 1882 3 years ago

    Thanks Nancy for this fine presentation. Pythagoras would be proud of you, but don’t go near the square root of 2, he will get all spastic. To work these type of problems, I use the web to find a table of trig. ratios. Looking forward to your next video.

  • Ahmad Mateen 3 years ago

    nancy you are so beautiful love you! i like the way you teach us!

  • John Godino 3 years ago

    Iโ€™m not even in school anymore but couldnโ€™t resist watching a new Nancy video!

  • Chintan S 3 years ago

    she talks like Mark Ruffalo

  • Phoenix 4726 3 years ago

    Oh My God, you are here again.
    Thank You.

  • bakri, tu kyu thak ri! 3 years ago

    From top to bottom u look like India’s Nora Fategi.

  • Fatih Sipleme 3 years ago

    hi nancy ฤฑ need your help please help me for this question
    hฤฑ ฤฑ need your help please help me for this question
    8 y ^ 2 = x ^ 2 – x ^ 4, 1/3 ^ (1/2)

  • Ciro Trejo Moya 3 years ago

    Love your videos, Nancy. Thanks to you, my master studies were not that hard. Hope we can see more of your videos in the future.

  • DozyProductions 3 years ago

    I’m watching math for fun

  • kishan pamnani 3 years ago

    How you are doing this… I mean how you are making video…Tell me

  • Richard Grimm 3 years ago

    Thank you for shedding a little light!

  • Yeyen Surat 3 years ago


  • Angelina Lopez 3 years ago

    I love how there like 50 dislikes yet thereโ€™s 3.4k likes ๐Ÿ˜‚

  • A Ch 3 years ago

    Can you arrange a series of video on thomas calculus please

  • Spindlerjk 3 years ago

    how do you do the writing?

  • saacid ahmed 3 years ago

    woow prefect you calculating the math like alberto Einstein i liked ๐Ÿ˜ฎ๐Ÿ˜ฎ

    • saacid ahmed 3 years ago

      can got phone

  • Rehan A. 3 years ago

    Why does it seems to like like LAMIS THEOREM…..

  • David Williston 3 years ago

    How come everytime you say don’t panic I start to panic.

  • Elder King 3 years ago

    Sorry for this type of comment, but I am simply a man.
    It is awesome when such a beautiful woman speaks math ๐Ÿ˜€
    This is the only semester I failed in all of highschool because of my teacher, went back and passed it in 2 days in summer school with a different teacher, wish I had you then!

  • Sergio Osuna 3 years ago

    Nancy is the best!

  • shoaib ahmed 3 years ago

    Hey madam how are you? ?

  • Ollie Crabtree 3 years ago

    hen you realise that she is writing backwards.

  • G K 3 years ago

    Oh my the way she write backward is truely insane๐Ÿ˜ฏ

  • Nihal Kumar 3 years ago

    I like your way of teaching very much can you please make videos on parametric differentiation

  • Reyna Inot 3 years ago

    I felt sleepy with your voice ๐Ÿ˜ด๐Ÿ˜ด

  • ashipree 1125 3 years ago

    You’re so beautiful

  • Louis Carliner 3 years ago

    Assuming that all of the angles and length of the three sides are known or have been calculates using the law of sines, knowing that the usual formula has been calculated using the one-half of base times heights, without going through the very messy process of calculating the a height, is there a procedure or formula for calculating the area?

  • creates_things 3 years ago

    im angry because i know you would reject me.

  • Vegan Satanist 3 years ago

    I will watch any nancy pi video, even if I know how to do this already.

  • Aditya JAAT 3 years ago

    Mam aap hot ho

  • WolfieSniper 3 years ago

    I love how you speak. It is charming and makes me feel relaxed and when I am doing any math I like to feel relaxed. Also, do you write on glass or what because I want to know? To add how hard is it to write backwards? I am also a lefty too and I hate writing in books because I have ink or lead on my hand afterwards? thanks for the awesome video and would love if you could answer my questions. thanks again.

    • KRISH CLASSROOM 3 years ago

      It’s the lightboard, actually she is not writing backwards she writes normally like us but flips the video during editing

  • fire tv 3 years ago

    I am studying bsc maths . but I can’t see such a beautiful maths teacher in my whole education career.

  • Mjd Ilast 3 years ago

    I like the way you teach Nancy, thank you for the hard work you put into your videos. You deserve more subscribers.

  • Charles Abernathy 3 years ago

    Great seeing you again.

  • Mandaria Yasin 3 years ago

    Owhhh thank U for the explanation

  • Focus Educate 3 years ago

    I want you to update every week. Please come back!!!


    I love your approach, you make maths more easy, keep up the good work.

  • Nadaan Balak 3 years ago

    What a YouTube recommendation

  • Maxamed Abuukar 3 years ago

    I love you

  • Leanne Raj 3 years ago

    Hey Nancy, could you also do how to factorize cubics, please?

  • Theo Ty 3 years ago

    Hey Nancy, do you write backwards on glass? Or do you have special software and a pen? Thanks!

  • Ayaz Ali 3 years ago

    nice way of teaching love it

  • Ambadi Lakshmi 3 years ago

    Nice…teaching #MasterMathematics

  • Israel Torres 3 years ago

    Glad to see you back Nancy!

  • easterangelou24 3 years ago

    Is she writing backwards? That would be crazy good lol

  • Prasun Guragain 3 years ago

    I can’t focus cause she is too pretty.

  • Mr Gardner's Primary Education 3 years ago

    Nancy! What software do you use to write on your video?

  • Royal King 3 years ago

    Hi Nancy can you make a video on complex number

  • hachidori 106 3 years ago

    Please excuse me, I’m sure I’ve asked before but,… please do a post about the Fourier Transform,… I could really use LaPlace but I’m a menial electrical engineer,… I just need Fourier …

  • Shashank Mishra 3 years ago

    Ma’am how do you shoot your video

  • Saroj Lal Films 3 years ago

    I’m falling in โค๏ธ love with Mathematics after seeing your videos. I guess you might be the reason behind how the term ‘The Beauty of Mathematics’ was coined.
    -Love from Nepal ๐Ÿ‡ณ๐Ÿ‡ต

  • Nithin don 3 years ago

    I’m in love with math after seeing u….๐Ÿ˜

  • God of Thunder 3 years ago

    if I had such kind of teacher, I’d definitely become the best educationist in the world ๐Ÿ˜

    • Datta Bhavsar 3 years ago

      Hi nancy

    • Datta Bhavsar 3 years ago

      You talk where well

  • Akanksha Prasad 3 years ago

    I can’t understand a thing I am in middle class I don’t know what are these identities for
    YouTube recommendations are also amazing
    However I have liked your video
    And I will come again after I have grown up a little bit.

  • Thinking Creatures 3 years ago

    ๐Ÿ˜ƒ can you make more Video for class 11th and 12th….

  • Jorge Todoroki 3 years ago

    thanks for holding my hand through math class

  • Virginia Brown 3 years ago

    I love this. I just discovered your page, and I want to say thank you. I am a computer science major, and I go against the stereotype. Some people dont believe in my dreams because of it. Thank you for going into what you love, no matter if you fit some mold that was set by society for every carrier option out there. I appreciate your mark on the world.

  • bravo3 3 years ago

    These trig formulas are extremely valuable in the building trade. Not all angles are right triangles. Knowing this stuff saves you from holding up heavy pieces of lumber (or steel) and marking the angle, or taping the lengths while leaning out over a thirty foot roof. Give it a try, thanks for the video.

  • kids Learning channel 3 years ago

    You are a maths Angel, really…

  • Abigail Maza 3 years ago

    I like her, your voice reminds me of Dakota Johnson!!

  • Mustafa Asaad 3 years ago

    ุฎูˆุด ุดุฑุญ ุจุณ ู…ูˆ ุงุญุณู† ู…ู† ุญูŠุฏุฑ ูˆู„ูŠุฏ ๐Ÿ˜‚

  • RitualTree5 3 years ago

    I donโ€™t get it

  • Daniel Zuzevich 3 years ago

    Hi Nancy. Have you ever looked at Big O notation in regards to computer science? Everyone is soooo bad at explaining it. Basically it boils down to calculating runtime and memory cost of a function.

    Not sure if you could do a series on it, but since you’re obviously good at math, there’s really not any “code” going on at all. Simply all theoretical math. I bet it would get a ton of views.

  • tech hacker 3 years ago

    Can we be friends ?

  • Dang Thao 3 years ago


  • Ace brhoom 3 years ago

    How tf does she write in backward thats amazing af

  • Ti Finesse86 3 years ago

    Can you do stats equations

  • Harshit Singh 3 years ago

    How the hell does she writes all the things in reflected form so that it appears correct to us…..

  • Aryan 3 years ago

    How the hell did u learned to write backwards

  • Damilola Akinbi 3 years ago

    Hi Nancy,

    I know my comment is a month late ๐Ÿ™

    I really enjoy your math teachings.

    But I’ve got this esoteric soft copy book I would like you to help me look out. It’s essentially logarithms, like advanced logarithm problems. I would love to get it across to you. I would love that you see it, because it could go a lonnng way to help me.

    Cheers Nancy ๐Ÿ™‚

  • Mxsmanic 3 years ago

    Your explanations are always very clear.

  • Abdellah Ayadi 3 years ago

    I love you nancy

  • ุนุจุฏุงู„ู‚ุงุฏุฑ ู…ุญู…ุฏ 3 years ago

    ุดุฑุญ ุฑุงุฆุน

  • Sami Deshpande 3 years ago

    Darling kya bable he

  • Bobby Poly 3 years ago

    For every video you make i’m so very thankfull!!

  • Arian Tashakkori 3 years ago

    hey Nancy, great video. Me and my frieds love to watch your content. My current math teacher, mr edwards is great, however u are greater. Just wondering what your skin care routine? need info for assignement. Is ur last name actually Pi or is that a stage name?

  • The Magician 3 years ago

    My crush is back.. welcome ๐Ÿ˜‹๐Ÿฅฐ

  • 2D Senpai 3 years ago

    Nancy, lโ€™hopitals rule please

  • Conor Oโ€™Flynn 3 years ago

    Good video great material Iโ€™m a maths teacher myself , use these questions for my students . And not bad looking either so Iโ€™m all signed up !

  • Yogesh Chauhan 3 years ago

    You should upload more videos

  • Neetu Kumar 3 years ago

    Mam plz tell me from where are you this is my dream I tend to meet you

  • Agara Mancing 3 years ago

    I see now…

  • cadley peterson 3 years ago

    GREAT work as usual.. love your videos. I am required to teacher some of my math classes online starting in September “thank you COVID 19” and i am interested in the writing system you are using. So far i think it’s the one that will work best for me. Can you share what it is and or how to set one up?

  • Domanic Marcus 3 years ago

    Dear NancyPi,
    I am taking Calculus 2. Can you please make a video about disks and washers and when to use either. Also can you please do 4 problems? Problem 1, disks about the x-axis. Problem 2 same problem, but this time about the y-axis. Problem 3, washers about the x-axis and Problem 4 the same one, but about the y-axis. You don’t have to solve them. I just have trouble setting up the problem. The integration is the easy part. The hard part is the setup. Please dumb it down as much as possible. This is the 2nd time I take Calculus 2 and I still do not understand it.

    • PurpleOnTop 3 years ago

      Domanic Marcus check out the organic chemistry tutors video

  • Chris Fritzke 3 years ago

    You make math beautiful ;]

  • XurSZN 3 years ago

    yoooo my g nancy

  • Barry Davis 3 years ago

    You brought the humor on this one! Awesome video.

  • kunal jaat 3 years ago

    Hot teacher beautifull

  • Jivitesh Pandab 3 years ago

    Do you write on a glass in front of you!
    It’s so amazing!

  • Brt Yildirim 3 years ago

    what’s the system that u use in your system ?

  • Joshua Duca 3 years ago

    me im going to learn watch all the videos from math how does it work to solve the problem

  • Joshua Duca 3 years ago

    i think its called geometry law of sines

  • Joshua Duca 3 years ago

    because the shape and letters are familiar to me hahhaha

  • Joshua Duca 3 years ago

    which means when you using sines of letter and using to equal the sines and put in number of degree i think it is? do you because im not very good at math hahaha

  • Ajay Kumar 3 years ago

    Helo mam

  • visualmathPi 3 years ago

    No one:

    Absolutely no one:

    NancyPi: This is how you solve for non write triangles *while global pandemic*

  • sameraze agvvl 3 years ago

    hey nancy pls make regular videos about advanced topic in maths , with a month that help me a lot ,
    we are from kerala (india ) your videos help me a lot , and i find that same videos in different playlist appers

  • Pruthviraj Khot 3 years ago

    You are the perfect example of beauty with brain ๐Ÿ˜˜๐Ÿ˜˜๐Ÿ˜๐Ÿ˜๐Ÿ˜๐Ÿ˜

  • Chatikh 3 years ago

    I wanted to thank you for your videos. Your videos on integration got me an A in physical chemistry! I loved the class, mostly because the math made sense because of your lessons. Thank you!

  • Anurag Baundwal 3 years ago

    Calculus 3 and differential equations please !!

  • The Teacher BM 3 years ago

    I have been following thus chanell, hoo my goodness, this is so steady and clear. I always check on this channel to see new uploads. I got inspired to create my channel too. You are really doing a great job. Thumbs up and looking out for more

  • Artistry of Mathematics 3 years ago

    Very nice nancy. I impreesed with ur method. I wanna follow u plz guide me

  • ุดุฑูˆุญุงุช ู„ุทู„ุจุฉ ุงู„ุซุงู†ูˆูŠุฉ ุงู„ุนุงู…ุฉ ุงู„ูƒูˆูŠุช 3 years ago

    wOW Great to see you back ! Welcome back you are our hero and super helper indeed thank you so much

  • KRISH CLASSROOM 3 years ago

    Madam can you please tell me what kind of board that you are using and tools..?

  • Ishaan Tayal 3 years ago

    U re beautiful โค๏ธโค๏ธ

  • Saurabh Kashyap 3 years ago

    Mam pls upload videos fast I really need it๐Ÿ˜Š๐Ÿ˜Š๐Ÿ˜Š

  • AT Shiva 3 years ago

    Hi can you do a video about curve integration please?

  • Sacred Satyam 3 years ago

    Make more videos and upload daily…

  • Ringo SP 3 years ago

    WTF@#k amazing you can Write backwards ? I still dont get eventually i will learn thnx for your wisdom

  • Tesla Beast 3 years ago

    Please explain trigonometric ratios and identities

  • Pharung Awungshi 3 years ago

    Wow!! It’s worth watching this video…๐Ÿค—

  • Sparsh Mishra 3 years ago

    I’m here not for studie, for watching this beautiful face ๐Ÿคฃ๐Ÿ˜๐Ÿ˜

  • Tariq Lennox 3 years ago

    Hello can you please explain finance( Simple interest )

  • Adriano de Morais 3 years ago

    Beautiful ๐Ÿ’• wonderful ๐Ÿ’•

  • Binod Rav 3 years ago

    Nice class mam

  • B 3 years ago

    Is it wrong to like a teacher?


    Thank you

Comments are closed.