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## NancyPi

Joined Apr 25, 2017

Nancy formerly of MathBFF has a new channel! All her videos moved here to NancyPi, and all her new videos will be here from now on! Thank you all for your support 💗 Please subscribe and spread the news!

Help Nancy re-start her channel: support her on Patreon so that she can keep making the math videos you want! www.patreon.com/nancypi

Algebra and calculus math help from an MIT graduate.

Help Nancy re-start her channel: support her on Patreon so that she can keep making the math videos you want! www.patreon.com/nancypi

Algebra and calculus math help from an MIT graduate.

# Video

**I Failed a Test (NancyPi)**

Views 127K7 months ago

**Power Rule... How? (NancyPi)**

Views 45K10 months ago

**Trigonometry: Solving Right Triangles... How? (NancyPi)**

Views 306K11 months ago

**Trig Substitution... How? (NancyPi)**

Views 148KYear ago

**Solving Logarithmic Equations... How? (NancyPi)**

Views 152KYear ago

**How to Remember the Unit Circle (NancyPi)**

Views 114KYear ago

**How to Solve Inequalities (NancyPi)**

Views 44KYear ago

**Quotient Rule Made Easier (NancyPi)**

Views 42KYear ago

**Synthetic Division... How? (NancyPi)**

Views 28KYear ago

**How to Do Implicit Differentiation (NancyPi)**

Views 219KYear ago

**Integration by Parts... How? (NancyPi)**

Views 326KYear ago

**How to Find the Inverse of a Function (NancyPi)**

Views 82KYear ago

**Derivatives... What? (NancyPi)**

Views 160KYear ago

**The Chain Rule... How? When? (NancyPi)**

Views 337KYear ago

**Introduction to Limits (NancyPi)**

Views 140KYear ago

**How to Solve By Completing the Square (NancyPi)**

Views 374KYear ago

**How to Integrate Using U-Substitution (NancyPi)**

Views 441KYear ago

**Basic Integration... How? (NancyPi)**

Views 268KYear ago

**Logarithms... How? (NancyPi)**

Views 539KYear ago

**Nancy answers your questions (NancyPi)**

Views 167KYear ago

**Simplifying Rational Expressions... How? (NancyPi)**

Views 108KYear ago

**How to Find Any Limit: Part 2 (NancyPi)**

Views 132KYear ago

**Vertical Asymptotes... How? (NancyPi)**

Views 117KYear ago

**Solving Systems of Equations... Elimination Method (NancyPi)**

Views 227KYear ago

**Radians and Degrees (NancyPi)**

Views 49KYear ago

**Derivatives... How? (NancyPi)**

Views 284KYear ago

**Solving Systems of Equations... Substitution Method (NancyPi)**

Views 180KYear ago

**How to Find the Limit at Infinity (NancyPi)**

Views 186KYear ago

**How to Find Any Limit (NancyPi)**

Views 301KYear ago

**How to Simplify Radicals (NancyPi)**

Views 181KYear ago

**Basic Trigonometry: Sin Cos Tan (NancyPi)**

Views 191KYear ago

**How to Solve Quadratic Equations by Factoring (NancyPi)**

Views 158KYear ago

**Factoring Quadratics... How? (NancyPi)**

Views 375KYear ago

**How to Find the Domain of Any Function (NancyPi)**

Views 277KYear ago

**How to Find the Horizontal Asymptote (NancyPi)**

Views 113KYear ago

**How to do Long Division with Polynomials (NancyPi)**

Views 124KYear ago

**How to Find the Vertex of a Parabola (NancyPi)**

Views 59KYear ago

**Nancy has a new math channel, NancyPi!**

Views 124KYear ago

**How to Use the Binomial Theorem (NancyPi)**

Views 273K2 years ago

Jessica P.30 minutes agothank you!

K.k Ubana BasseyHour agobeautiful and intelligent.i will adopt you as my DAUGTHER,role model.

yarabamba2 hours agoWhere are you? The million dollar question.

Triskaideka thirteen3 hours agoDo you work on Statistics? dominiqueleh717@gmail.com

beverly francis3 hours agoLOL. Nancy story. Thanks.

Fola Shade4 hours agothank you

Teddy harawa7 hours agoYou are fantastic. I am in love with Calculus because of you

Luiz França Martins9 hours agoI’ve been wondering all through my math classes, “there has got to be an easier way to learn these things”. Thankfully, youtube made it possible for us students to see those ppl who found a simpler way to explain math!

M D12 hours ago10:40 ON THE TOP U CAN FACTOR 3....

jansen macabangun14 hours agoi cant concentrate on the problem i concentrate on her face :D

Tristan Hurley15 hours agoWriting backwards so naturally is the most impressive thing about this.

tlamelo sebopelo16 hours agoyou are beyond my teacher even.i understand more when its you teaching.

Hidaya Nisha17 hours agoVery nice 👍👍👍

NARKFLY18 hours agocould pause this video at any point and she still looks gorgeous, huh-dayum!!!

HARESH RATHOD19 hours agoI know how you write....... Mirror effect by camera recording...... although you write on transparent glass..... Guys if you check this effect see video in normal mirror.......

Sebastian Michaelis20 hours agoI failed this test

Chong Wei Yan20 hours agoTHANKS T.T

Arturo Presa21 hour agoIs NancyPi left-handed or right-handed? This is the key to understand how they prepare a video like this. Well, the answer is that she is right-handed, even though, she seems left-handed in this video.

Bud PetreyDay agoThese videos are great. I can actually understand them. My professor can get really deep into theory and misses a lot of basic explanations, but I'm getting it all here now. Thank you!

Burke BecklundDay agoGreat videos. Multi Color and Writing backwards is amazing. Oblique Asymptotes Please

MRODay agowas that Mathbff a contract channel, I mean some kinda contract to make videos for them. Or it was your own channel and you just changed it's name?

Sanjay Rathore hardoi gujar jalounDay agoHi

Yusra AftabDay agoYou are amazing at explaining! Thank you so much and please keep making videos! :)

pedro barnitoDay ago0:36 about write backwards, just wanna give people a clue. ;) Nancy use the right hand here , but in the videos she use left hand, ( if you people have just a little IQ you can find out how she can do it ) sorry Nancy , but nice trick

Anthony GatoDay agoI know the way u write backwards.

Muhammad ArslanDay agoit is not important that you teach me.but it is important i appreciate your beauty. good looking.

Kishore SubramaniDay ago0:42 how did she managed to say the left & right with viewers perspective 🤔🤔

Trevor WeirDay agoYour explanation of derivatives in your other video "Derivative... What?" appears to be subjectively "more clear" than your precise definition given in this video. Love your work, btw. Your use of the clear, writable surface is far better than other videos here in youtube that use a voiceover along with a paint program.

Palaboy TraderDay agoI dont know why I subscribe here, but shes just like a magnet to me. I love mathermatics but since i had some brain hemorrage or something, i had a hard time remembering things. But I really do love mathematics and would like to get back at it some day. Now just using the math in Stock Trading, fun and easy...

Qishi LiDay agoOne of the greatest mysteries of mankind is - how the hell does she write backwards?

Way CoolDay ago"Blame the teacher"? All this time, I believe I was the only one thinking this.

Abdul Wadood khanDay agoi want to make you my girl and love u so much you solve all of my problems and i also write with left hand

Way CoolDay agoYour handwriting backward looks better then my normal handwriting. Sign me up for your handwriting class.

Jawad MohammedDay agoAmazing. Thank you for the great job. Best math channel ever

Malak KhalifaDay agoYou are a great teacher i can understand every word you said although iam from arab country i can understand everything from you

Billy KDay agoI subscribed and I have no idea why.

fan pubg de mortal teamDay agoYour so beautiful

fan pubg de mortal teamDay agoPlease you make this video in Punjabi or hindi,, i don't understand Your English

George Lander2 days agoI was wondering how they made super rollercoasters safe, now I see the applications. Thank you.

Qishi Li2 days agowait a second... how do you write everything mirror-inverted?

Bi Huỳnh2 days agoThank for your wonderful video! You're such an amazing, beautiful and mathematics youtuber!

Anubis2 days agoI use log in programming from time to time, but had no idea what it was actually for. This was pretty much the only way I ever used it: int(log(n)) + 1 = x. I didn't know what it was doing, but I know that it would give me how many places 'n' was. (ie. int(log(2542)) + 1 = 4)

ro king gurls2 days agoAfter watching this video 10 times now I got it Maybe...

Lowrence pireira H.A Lowrence2 days ago1] Show that 9^n+1 -8n -9 is divisible by 64 whenever `n` is a___________integer...? [Explain in a saparet vedio] {if u can not solve this...I will unsubscrib u and i will dislike u. } and lost one is i am waiting alw

ANUP KUMAR2 days agoMam aap London se lagti ho

Omkar badhe2 days agoVery helpful

Lasse Nielsen2 days agoYou have shown me how difficult math really is, and have helped me in my decision to drop out of high school. I want to thank you for your help ;).

Christian Raasteen2 days agoI agree dude, This video has really given me a revelation. I wish I had known that math would be that hard. I should drop out aswell.

CAHI2 days agoThis is so confusing for someone who doesn't know anything about this.. is her left my left or right?????

fadia a.wahab2 days agoThank youuuuu

fadia a.wahab2 days agoFirst I was bad at trigonometry but after this video I go an A+

Shakir Dorand2 days agoWhat's your ig, can I marry youuu??

Allen Glienz Miralles2 days agotomorrow is our exam on calculus cant even focus what shes saying coz shes gorg as fck HAHAHAHAAHHAA

ǝpoM3 days agoShe gives me asmr lol

YuukiRbrn LeClavier3 days agoI live on the east coast (i.e. probably near you, if you still live within daily commuting distance of MIT) but you can't have my pasta :0. Rather, I'll buy you your own : )

The-T Channel3 days agoThank you for this video it was very helpful 👏🏽

shylingg3 days ago0:16 "And now it's come back to haunt you in highschool" Me, in junior high: :')

Leansifer3 days agoTHANKS FOR TEACHING ME THE CHAIN RULE, TEST IS IN 4 HOURS, IM FUCKED LOL

Leansifer3 days agoYOOOOOOOOOO SHES HOT AS FUCK

Shubham Pandey3 days agoFinally I concentrate in study

Jim Capone3 days agoWow, finally someone who can explain this to me! Thanks for SHOWING the algebra: other videos assume you already know it..

PRAMOD KUMAR YADAV3 days agonahi samja

Melissa Moussa3 days agoOk wow

Sepahe3 days agowas this the last video ?

Abram Joshua Bardon3 days agoI really focus on your eyes only. not in what you are teaching me :D .. so gorgeous and smart :)

メSusan3 days agoSalute this lady.. She knows something that most people don't know

Kristy Wilday3 days agoHi Nancy, you make it all seem so simple. What if you have cos times pi t sin pi t. I don't know how to put in the pi sign.

Wisdom Munangisa3 days agoam crushing on her

Lakshveer Saini3 days agoI cant understand mam please explain again plzzzz 🤔😕

Vsk3 days agoWhat happened at 1:15?

Caitlin Callaghan3 days agoOh, my word...I Iove you so much after the whole of 2019 has passed I finally understand how to factorize.

Shaburu3 days agoshouldn't the written stufff be flippped

Michael Rakestraw3 days agoWow! I think you finally made all the pieces click. Thanks.

lame ellen3 days agoyou make maths easy and lovable...wish you were my lecture

Duckydave4643 days agoI am 12

Brianna Longdo3 days agoTHANK YOU!!!!!!!!!!

Chase Pearson3 days agoIt tool me forever to figure it out. Shes actually inverting the footage so she can write regularly Irl.

Avdhut Mahadik3 days agoButsimplieriscompletelysubjective

Tom Fortin3 days agoWow! A beautiful young lady who can explain calculus so clearly! Nicely done!

Puff Dragon4 days agoDamn, I wish I had had a math teacher like you when I was taking Calculus. I'd have been the most motivated kid in the class. Anyway, the way you give the definition of a derivative is exactly the way our textbook and professor explained it but they added a couple of things. He said the derivative had three basic interpretations that were all correct. First, the derivative is algebraically the limit of a difference-quotient. Second, the derivative is geometrically the slope of a tangent-line. And third, physically the derivative is the rate-of-change of one variable with respect to another. I think you alluded to all three but didn't spell them out. Subscribed.

Custom Coach Works4 days agoWell, this is the first time I’ve subscribed to a math channel.

Elijuah Penn4 days agoare you writing backwards ??

ABunchOfSmallAliens4 days agoThank you so much!

Jason Jolarpersad4 days agoThank you for showing me the correct and easy way in doing trigonometry

David Lacziko4 days agoWow. No way! I finally understand! Now I won't fail my test tomorrow. Thank you so much!!🤗

Kyle Starr4 days agoCan you do a video on Vectors please?!

Disected Frog4 days agoRelated rates? That would be super helpful!

Andrew Gutierrez4 days agoThank you Nancy the right handed teachers make me feel like I'm doing it wrong now I know I'm not thank you

Faded.x_4 days agoI could not remember how to do this to save my life, despite the fact I'm in a physics class and should really remember how to do this. Thanks for the refresher.

Reynaldo Limbaga4 days agoMiss Nancy, can I ask you something about Mathematics?

Reynaldo Limbaga4 days agoyour explanation is very clear.

Christopher Cabintoy4 days agothank you

Israa Fawze4 days agoThis video helped me alot thanks ,😍💞

Israa Fawze4 days agoThis video helped me alot thanks ,😍💞

Aladdin Ba4 days agoYou r AMAZING!

Arjun Jain4 days agoI love it when she says substitution... and all those other things

Abed M4 days agoYou are the best! I can only show love through subscription and likes 🤗

Anthony Gato4 days agoHot nerd. 🍑🍆

CatiaProjects TV4 days agoAnother thing is that these math problems should be considered as a warm up for students. In real world we should use Matlab!

Vesa S3 days agoI think that a lot of students consider these problems as the necessary evil😅 But yeah Matlab is great when the s**t is getting real.

CatiaProjects TV4 days agoI think you've spent a big portion of your time practicing writing right to left. Well practice makes perfect.

Jey O.3 days agoShe writes normally (from left to right) on a glass board and then flips the video in her editing software. So unfortunately, I don't think she knows how to write from right to left 😂😂😂

Anthony Gato4 days agoSuch a soothing teacher.