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 https://youtu.be/a5WQlcFTXyk. For an intro to TRIGONOMETRY BASICS (sin, cos, tan, csc, sec, and cot) and SOH-CAH-TOA, jump to: https://youtu.be/bSM7RNSbWhM.

Support Nancy on Patreon: https://www.patreon.com/nancypi

Follow Nancy on Instagram: https://instagram.com/nancypi

Follow Nancy on Twitter: https://twitter.com/nancypi

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: http://nancypi.com

Editor: Miriam Nielsen of zentouro @zentouro

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I liked before even watching because I knew it would be good ๐

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Wtf

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Itโs difficult to have a beautiful woman with a good head

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Thank you ๐งก

!!

You’re back! We missed you so much!!

Stay safe and keep it up ๐๐

I love your videosโฅ๏ธ I can always understand a lot of concepts from your videos

She’s Back…

Please do videos on infinite series… I’m trying to understand what the hell convergence actually is and why it matters.

I’d recommend going on r/calculus in the meantime.

Hey buddy

7:36 *”i mentioned it..in case you are sleeping too well at night”* lmao ๐

She’s so awkward and I love that lol

This actually made me crack up. Ambushed by a joke. ๐

Hi

who was the only thumbs down? ex BF ?

My GAWD! You’re back!! Love math logic – which you bring to life. Grateful!

I was doing it and I was yeah the next step is take the reciprocal of each side and then solve for(a),then you said cross multiply and I was like ok we can do that too lol ๐

Mam please make videos on permutations and combinations.๐๐๐ฅฐ

We missed๐ youโ๐

You are Ok Thank God!

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Nancy, thank God you’re back! I have been holding my breath until your return. Should I thank the quarantine for this?

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weird had a dream about you this morning , you were j sitting on a stool shrouded in darkness , you said something , can;t remember ,,i do remember but its locked in transitional media / restricted area* any way

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Best explanation..

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Cute and intelligent, that’s a dangerous combination โ๐ฅ๐

You make me like math thank you!

Estoy bien enamorado de ti

When I learned this stuff in high school, had to use tables in a reference book. Bet you never heard of such a thing.

What, no slide rule?

@Robert Osterman Believe it or not I still possess my slide rules from highschool – had this silly idea that my own kids might have use for them. Unfortunately, the batteries must be dead because I cannot make out the results, thus I pulled out an old trig text book for the tables.

You always seem to be sleepy when making these videos. I suggest to cut down on your sleeping pills! Sorry to be blunt!

You know what youโre doing! Iโm a heterosexual man!!

Omfg sis just appeared on my subscription Iโm shook

Hi Nanci welcome back!!!!!!! we havent seen you for a while now, it is good to have you back. I am sure all the rest of us are happy to see you back on your teaching.

I honestly have been inspired on how you do this, that is the reason why i was inspired to create my channel about teaching Math and how to make Math accessible to every student, as I am a Math teacher too, besides me doing online teaching now because of this pandemic. Im soo glad to see you back again…we all are!!!!!

Nancy is back. I missed u like a lover. ๐

Wao nancy you are back I’m happy

Welcome back , great to see you.

Guys for mathematics u can check my videos too

Beautiful mind

Hi queen!! Moving to calc 4 in the fall and bless your soul for helping me get there. Wish you could help me with that too ๐โค๏ธ

gab my heart bows to you ! bravo

silverbird58 thank you!! Lots of effort and tears!

@Gaby P Calc 4!!! God bless your soul lol…. I’m glad my major doesn’t make me go that high in math.

which book do you follow?

Glad you are back. Yayyyy

Nancy you are very smart the best Math tutor ever I love you ๐ฅฐ๐๐๐๐๐๐๐๐๐ฉโ๐ฌ

i would love to see more vlogs from nancy <3 i wonder how sheโs been doing during quarantine

Holy God, I’ve been waiting for your new videos forever. Keep up the work and many thanks!!!

She’s so fuckin’ gorgeous.

Great!โค๏ธ

Missed you like hell

NANCY PI!!!!! Best videos ever. Helped me out so much.

Throwback to when she helped me through calc๐ฉ

SHES ALIVE!

The amount of help your videos have been is indescribable, as someone who’s education was muddled from constantly moving around (military family) and having learning problems (Autism & ADHD) everything I’ve seen from you has not only helped bridge gaps in my knowledge, but has also helped me better understand what is even going on with half the concepts I’m currently doing. You turned me round from freezing in fear and not knowing what to do into someone who is actually happy to do maths.

Very happy to see you are back at it, please don’t stop. You’re beyond valuable, thank you!

I agree Nancy videos are very helpful ๐

Welcome back

Thank you, Nancy

:0 Shes back

So essentially, this is part I. Here’s an idea: summer’s coming up and IMHO it’s a _great_ time for a sequel! Start the ad campaign now then bust it out in June!! ๐ ๐

Thank you

Cute bookworm!

Im not even taking math anymore but your video popped up and I had to watch, youโre the best!!

You should set up your website to accept BAT Tokens if you have not already ๐

Honestly i learn more math from here that in school keep up nancy

I was thinking that she quit but here she is back… We missed you hope you will make some more vids.

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

triangles are nothing but deflated squares

ูุงููู ูุงูููุง ุฌู ุงู

Iโm not here for math. Iโm here for her

YOURE BACK!! this just made my entire week

alison thorpe great

u made my week ๐

Hey!

Excuse me

My thought exactly! Trig time!

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

Thank you

OMG THANK YOU SO MUCH!!! MY horrible trig teacher tried to teach this to the class but nobody could understand a single thing. I knew youโd be there to help. Thank you very much NancyPi!!! ๐

You are a lifesaver during quarantine

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

They did the same thing. But we were confused, not really focused in it. And he took an entire hour for that. ๐๐คฃ Thanks Nancy

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

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?

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

Nancy the cutie ‘pi’ is back again ๐

Thank you for sharing this lessons Nancy you are awesome ๐๐ ๐ฎand cute ๐ณ๐โ๏ธ

Safe return ๐ฌ

2016, what do you effing want?

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

Glad your back

Lmao how does anyone actually learn any math lol

I can help you. Anyone can!

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

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

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

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

Heyy!!!

Welcome back

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.

First video in six months, did you make parole?

You welcome back!

Hey nanci love you. I’ve been watching your videos from 2 years. A lot of lova from your biggest fan. Perfect example of beauty with brain

Sorry its love

So glad to see you back!

Hey can you make a video on principal equations

I love you sister . Please accept Islam . If you have any questions I will answer them .

back?

Nancy is back ๐ฅบ

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Glad to have you back!

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

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…….

๐ต๏ธโโ๏ธ

Multiply by

. ๐ธ

โคโค both sides and be reciprocal

Do a livestream session! Would like the Queen of Maths to be my temporary teacher during quarantine๐คฉ๐

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

Long long time……..

Wow nice to glad to see you after long time….. Thank you ๐๐๐๐๐

Beauty and brains! You are

Sheโs back!!! Thank goodness!!

Welcome back Nancy

love u mam

We need teacher like you in India.

Shaanti se padhai hoygi.. just calmmm relax and…

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 !

You came back, Nancy! ๐

Please upload videos soon mam from Ansheshwallah

after long time. happy

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

Mi loco no se Inglรฉs pero quede encantado con ella

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

Thank you Nancy pi

Beautiful ice queen.

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,.

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

I’m not gonna lie to you Nancy but it’s a little bit late for this now ๐๐

So what did people do before calculators?

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.

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

good to see you again,

Ah, okay, she’s back. All good then.

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! Iโm not sure I wouldโve made it through all the math classes without it.

Omg this is hot to watch

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

cool

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

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.

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

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

RJ

Verry good. Thank you teacher lovely ๐๐๐

WOAHHH WAIT THIS IS THIS WEEK’S HOMEWORK!!!!! AND NANCY YOU’RE BACK!!! ๐๐๐๐

Nancy can you please put Cosine rule on your list for videos please? It would be very much appreciated โค๏ธโค๏ธโค๏ธ๐

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

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

Yayyy our faourite teacher is back

If beauty with brain had a face

Welcome back๐๐๐

I think you would not make a video again.

Stay at home and give us more videos , thank you

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

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 ๐ love from Australia

Good lecture for deliver

Sheโs back!

๐ซโฅ๏ธโฅ๏ธโฅ๏ธNancy we missed u so much

Was waiting for you from a long time

You are a God among mere mortals!

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

Queen is back!

Hi Nancy welcome back

Iam math teacher from iraq

Can you help me

About your glass board

And you studio

Thanks

Best wishes

I just love โค๏ธ you Nancy

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

My Teachers this Quarantine period:

– Mathematics: NancyPi

– English: English with Lucy

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

Same here!!!

Woahhh wtf bro so same!!!

-Psychology: Jordan Peterson

-Physics: Fermilab

minutephysics

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 greatlyโbut 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.

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

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

Thanks for posting videos again

We missed you

You are so cute nancy.nice vodeo

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.

Your teaching is just awesome,well come back

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!

I don’t have maths, yet here I am!

Damn damn damn, math.

what is the theatan of that heart thingy?

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 ๐

I have watched tons of Nancyโs videos and that has led me to the Homemade Mathematics page which has opened up a whole new batch of content ๐ฅณ๐คฏ๐คฏ

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

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

Homemade Mathematics Awesome! LETS GOOOO!

Any link of your channel?

Nancy pie is back ๐๐๐๐๐โค๏ธ๐๐๐โค๏ธโค๏ธโค๏ธ๐๐

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

that’s so great you are back

Glad you’re back.

OMG!! you’re back!! <3

Now I can get a good sleep! ^^

man i missed your beautiful face …welcome back madam

you look ravishing than before…

Darling he

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

we are so happy cause your back๐๐

Thanks for the great video

you helped me pass calc. thank you nancy

Hello!

Can you do one on laws of cosines

welcome back queen

Hi Nancy

Welcome back. Keep up the great work

Fans Only ?

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.

Ah! Finally you’re back

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

Yeah, so glad to see a new post!

Is this old recording? Plzz tell idol

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

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

What kind of pens are used in the explanation?

๐โค๏ธ๐น

This women soo beauty ๐ญ๐ญ๐๐ฅ

Our math queen is back<3

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

what play list belongs this videos

๐

Mam i am from India thanks ๐

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

I learn so much , thanks

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

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

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

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

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

You are a real head turner !!

Iam so happy to watch your lecture thank you so much

She should talk about calc 3! ๐๐

How do you find reciprocals for fractions??

Superlative explanation.

She is alive!

So sexy Nancy. ๐

Yeeees! Best news of 2020 yet!

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 ?

How could I focus on math with such a beauty in the video๐๐

I love you

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

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,

LG

My favorite math tutor

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

if u taught finance and economics I would get a distinction

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

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

Hey nancy.

Please make a vid on second order derivatives…

Nice to see you. To see you nice.

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

Yay! you so awsome, we missed you.

Great video nancy.

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

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.

Hi Nancy Have you done anything with applications of the Fourier transform?

I am particularly interested in holography and lens less microscopy.

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?

Thanks for your help

God bless u. Nice vedio

FIVE PEOPLE TURN DOWN THIS VIDEO, THEY MUST BE FROM THE TRUMP ADMINISTRATION.

*THANK YOU FOR SAVING MY GRADE FOR CALCULUS! SERIOUSLY!*

this made my life YOU’RE BACK

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

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.

Thank you so much

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

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.

You’re back! ๐

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

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!

Long time no see!

OMG wait if we all put in like a few dollars each month to NancyPiโs 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

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

First time I see a pretty math teacher๐

Thanks for being back

Really helpfull….

๐.From Turkey

Yeeeeeeeee u back

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.

Respect โค๏ธ

Great love from India ๐ฎ๐ณ๐๐ฎ๐ณ

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! ๐

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

Thank you for your help. โบ I do love you my teacher. โค

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

Trying my best to pay attention but I get distracted.

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

omg her voice is amazing…

Your video is so nice mam…

Love from India.๐๐๐

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

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

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 lโhรดpitals rule. That would be great. Thank you.

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?

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

It’s soo refreshing to see u

You have come back !!!

Yey…. your back Nancy-pi …….. not a math person but thereโs always something one can learn from a talented educator plus your sweet presence ๐

You are smart and beautiful

Marry me plz. ๐ ๐ ๐

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

She writes it all backwards left handed!

ya abiii nerdesin geliyim buliyim seni ya

The best side of having known english is YOUUUU

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

I didnt notice that at the beginin…

Something is up

Must be a mirror app thgh

NancyPi is the best.

after long time you uploaded a video

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

Yay, you’re back!

Nice

I love u. U r awesome

Please mey what board you use to write.

Glad you’re back on and posting videos again!

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

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. ..๐

Nice lecture

from where you are mam

dont stop making videos you make more sense than my professor

U r very pretty sis

please make some classes on integral calculus!!!!!!๐๐๐๐๐๐

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

Can u teach applications of differentiation?

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

well another video comes after that corno ends i guess๐๐๐

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

Sheโs back yessirrr

What did you major in at MIT ?

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

thanks

You voice is so cute

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 can’t focus,. Help me!!!!!

i can solve it with two methord …

low of sine….

ms nancy pi happy teacher’s day

hocam at gibisiniz maลallah

Are you even real?

nice

Can you make vedios for jee mains

You are so hot and sexy

So, Are you married now ?

I just love the title of ur videos! ๐

Thank Ma’am ๐

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

I like 10000 times how u explain my world best

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

Where were you? Nice to see you back!

I am studying from India good teacher

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

Me likie

ยฟCan’t be subtitled with other languages?

Upload videos on vector algebra

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

Done. ๐

Thank you Nancy love from Africa ๐

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

Beauty with brains. ๐ฅฐ

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

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!

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

Your channel is very beautifulโบ.

We also have a math channel in Spanish๐๐. What kind of blackboard do you use so that people can see you and what you write?

Upload full video of properties of โ

Is she real or is it a robot?

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

Can we chat,dear

HI NANCY. . GOOD JOB.

HOW CAN I USE TRANSPARENT BOARD LIKE YOURS ?

WITH THANKS. โบ

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)

nice video

You’re such a fucking beautiful…

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

Nancy pi a qt3.14

๐ช๐ช๐ช๐ด๐ด๐ด๐ด๐ด๐ด๐ด thumbs down

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

How can you write it that way?

who knew math was so hot

Wish u were my math teacher and smooth with the like

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

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!

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

Looking very ๐๐๐๐

๐ฅฐ๐ฅฐ๐ฅฐ๐ฅฐ๐๐๐๐๐๐๐๐๐๐๐๐๐ฅฐ๐๐ฅฐ๐ฅฐ

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

only once in 6 months๐ข

Tbh i was only watching her the entire time

๐

๐

๐Hermosa

๐

๐

Want Video on INTEGRALS and APPLICATION OF INTEGRALS

Your lectures are a treat to my eyes.

#lrnwthdeepika

No la entiendo del todo pero es hermosa.

Nice and amazing

ๅฏ๏ผๆฏๆ่ฏๅพทไธ่ง่คฒๆถตๆฐๆฎ๏ผ๏ผ๏ผSO๏ผ??ใ

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

Good video ๐i like it ๐ฏ๐

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.

My name is Muammar Kamal

I am Iraqi Math teacher

You are so beautiful and prettier , thanks for video

Nice

expontial how can calculated can you understood

hi

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/โฯ. as radius of circle and it’s still satisfied all the trigonometry conditions ????

Use the bhagwati shakti trikon

How I talk with you

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

I was really waiting for this video

Welcome back Nancy!

Perfect combination Beauty+intelligence=Nancy

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

HOW YOU ARE WRITING ANY TOOLS PLS INFORM ME

Liked!

Hi Nancy! Can you please make videos on Sets

Omg

How does she writes in inverted/mirror?

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.

Please make another video about the last case you mentioned

Being shady, How mean.

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!! ๐ 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!!!

I love you mame

๐๐๐๐ท๐ท๐ท๐๐๐๐ท๐ท๐ท๐๐๐๐๐๐๐๐๐๐ท๐ท๐ท๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐ท๐ท๐ท๐๐๐๐๐๐

Hi,

๐ค๐ค๐ค

I Love mam aap se pyar kr te haโคโคโคโคโคโคโค๐๐๐๐๐๐๐๐๐๐๐

Ye hindi janti h dost

๐คฃ๐คฃ๐คฃ…

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

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

ููุทู ูุดุทู

Interested vdo

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

Woman are a complex maths equation complicated lol

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

Mam you are so beautiful

*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!!!!*

Excellent explain ๐

Brain with beauty ..

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

I thi

Nancy you are a excellent teacher love you very much

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

Hottest Math teacher on youtube

you’re pretty๐๐

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

Love u mam im from india

Please upload regularly

so beautiful

Love it

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

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

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

btw law of cosines could have also been nice <3

Quarantine has all the content creators coming back.

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

You are as beautiful as math.

U are so beautiful ๐๐

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

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

Aw! back againโค๏ธโ๏ธ

Where were u? I waited so much ๐ญ๐๐ญ to

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

Is it me or does she have very long arms

Nice tuitor, I admiring you

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

Just a simple video editing trick. Video is flipped

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

Nice classe

Impressed

โa+b=11

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

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

You should do another Q&A video

Non threatening Maths, great!

NancyPi is Very Hot!!!

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

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

รtimo . Adorei a explanaรงรฃo.

NancyPi I love the wild child is inside you

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.

Yay, welcome back!

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.

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.

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

Hello madam ๐

how u do this on screen can u please explain it

i mean writing on the screen

law of cosines? when?

Muy bueno!

Dang… fine and smart wifey material

Maths girls are wife material!

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

How to calculate valu of sin34

I saw you and I gave like

Most attractive woman on YouTube….by far!

Mam you are very cute๐๐๐๐๐

Nice method

Madam jee rauaa kaha se bani

Intelligent and beautiful ๐๐

You made my day…thanks

Precious girl! And what a great teacher.

Lo ando viendo el la bella cuarentena

When did you become an expert in Trigonometry?

Me: Well, it’s complicated.

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!!!!!

which software do you use?

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

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

you aer good teacher thank you

Hola.

ยฟNo puedes explicar en espaรฑol?

En ingles no entiendo.

Nc

Professora linda๐

Can you please tell which application u r using here to teach

It will be highly obliged

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

Western culture is worst no respect interaction between teacher and students

Can you provide me editing method like this vedio

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

Thanks

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

Now shes ruining my good night sleep ๐

math=mental abuse to humans

Wow thรฌ ra lร ฤang o chuรดng em bรฉ mat me nhแป hehehe ha ha ha

๐ฒ๐ท๐ฒ๐ท๐ฒ๐ท๐ฒ

Fantastically delivered in such a simple and lovely manner

Hope to be like you someday

Mathematics Teacher from Nigeria

Killer dress, needs a plunging neckline though.

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.

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

Iโm not even in school anymore but couldnโt resist watching a new Nancy video!

she talks like Mark Ruffalo

Oh My God, you are here again.

Thank You.

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

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)

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.

I’m watching math for fun

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

Thank you for shedding a little light!

Nice๐ฅฐ

I love how there like 50 dislikes yet thereโs 3.4k likes ๐

Can you arrange a series of video on thomas calculus please

how do you do the writing?

woow prefect you calculating the math like alberto Einstein i liked ๐ฎ๐ฎ

can got phone

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

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

Sorry for this type of comment, but I am simply a man.

It is awesome when such a beautiful woman speaks math ๐

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!

Nancy is the best!

Hey madam how are you? ?

W

hen you realise that she is writing backwards.

Oh my the way she write backward is truely insane๐ฏ

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

I felt sleepy with your voice ๐ด๐ด

You’re so beautiful

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?

im angry because i know you would reject me.

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

Mam aap hot ho

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.

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

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

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

Great seeing you again.

Owhhh thank U for the explanation

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

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

What a YouTube recommendation

๐ ๐

I love you

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

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

nice way of teaching love it

Nice…teaching #MasterMathematics

Glad to see you back Nancy!

Is she writing backwards? That would be crazy good lol

I can’t focus cause she is too pretty.

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

Hi Nancy can you make a video on complex number

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 …

Ma’am how do you shoot your video

I’m falling in โค๏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 ๐ณ๐ต

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

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

Hi nancy

You talk where well

Gr8t

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.

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

thanks for holding my hand through math class

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.

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.

You are a maths Angel, really…

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

ุฎูุด ุดุฑุญ ุจุณ ู ู ุงุญุณู ู ู ุญูุฏุฑ ูููุฏ ๐

I donโt get it

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.

Can we be friends ?

๐ธ๐๐ฅ

How tf does she write in backward thats amazing af

Can you do stats equations

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

How the hell did u learned to write backwards

Hi Nancy,

I know my comment is a month late ๐

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 ๐

Your explanations are always very clear.

I love you nancy

ุดุฑุญ ุฑุงุฆุน

Darling kya bable he

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

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?

My crush is back.. welcome ๐๐ฅฐ

Nancy, lโhopitals rule please

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

You should upload more videos

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

I see now…

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?

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.

Domanic Marcus check out the organic chemistry tutors video

You make math beautiful ;]

yoooo my g nancy

You brought the humor on this one! Awesome video.

Hot teacher beautifull

Do you write on a glass in front of you!

It’s so amazing!

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

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

i think its called geometry law of sines

because the shape and letters are familiar to me hahhaha

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

Helo mam

No one:

Absolutely no one:

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

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

You are the perfect example of beauty with brain ๐๐๐๐๐๐

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!

Calculus 3 and differential equations please !!

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

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

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

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

U re beautiful โค๏ธโค๏ธ

Mam pls upload videos fast I really need it๐๐๐

Hi can you do a video about curve integration please?

Make more videos and upload daily…

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

Please explain trigonometric ratios and identities

Wow!! It’s worth watching this video…๐ค

I’m here not for studie, for watching this beautiful face ๐คฃ๐๐

Hello can you please explain finance( Simple interest )

Beautiful ๐ wonderful ๐

Nice class mam

Is it wrong to like a teacher?

Thank you