This left me far more confused than when I started
@montvmontv1174 жыл бұрын
my prof said with chain rule to always say "the derivative of the outside times the derivative of the inside" it may make sense. so (stuff)^2 derivative is 2*(stuff) then take derivative of stuff. so 2(stuff) * stuff ' here sin would be cos. 2sin * cos
@priyankaboopathi7294 жыл бұрын
Exactly.. 😥
@Saurabh_Tewari0074 жыл бұрын
Well it cleared my doubt even though he wasn't really teaching
@aimzf204 жыл бұрын
MonTV MonTV this cleared it up so much for me, thank you!!!
@sudhamajayanthi3 жыл бұрын
@@montvmontv117 I understood nothing but “stuff” 😶
@Yue27s Жыл бұрын
wow super thanks mr.Khan kumar, now i really understand with this thing called chain rule how it work, but still cant visualized it but thanks i clearly know how it works now
@jimshtepa54233 ай бұрын
how does one tell composition of functions from single function?
@beegking3 жыл бұрын
this is so clear
@rosskious70844 жыл бұрын
Master explanation !
@Eeeurrrrrr4 жыл бұрын
I praise thy holy salaman kotal khan for his great work in the field of mathamatics. Without his holy butttery voice, I would be but a mere padwan of what I am today
@naziasiddiqui88073 жыл бұрын
U play mortal kombat
@Kervvy3 жыл бұрын
@@naziasiddiqui8807 U play DN
@EastSideGameGuy6 жыл бұрын
I sometimes come here to listen to his voice ._. it's soothing makes math Beautiful
@bonafidecatlover34433 жыл бұрын
Coming here for the first time and I can already see this man having a wave of fangirls
@Jcava54 жыл бұрын
sorry, i feel like you shouldn't have used sin x, and instead just a simpler function. ive learned and understood the chain rule before and came here for a refresher and this didnt help :(
@jamessanpedro2233 жыл бұрын
(x+y)^2
@PenandPaperScience3 жыл бұрын
Or ln(x^2), like I solve step-by-step in my newest video. It might help you understand :)
@chawza84024 жыл бұрын
oh my god! my teacher taught me this but never mentioned it's called chain rule. I blindly use this method without knowing what it is for!
@nafy23023 жыл бұрын
What is wrong with your teacher
@chrisfreilich2 жыл бұрын
Still trying to figure out EXACTLY what 'with respect to' means. People always seem to gloss over it or talk around it.
@AFCA-vn9bl Жыл бұрын
If you differentiate x^2 + y^2 with respect to x you will get 2x while differentiating with respect to y gives 2y
@thanaa64012 ай бұрын
It's just that you want to find the derivative (i.e. slope of the curve y = f(x)) AT the point x So whatever the point x on the line x squared, it's derivative will be 2 times this point ( i. e. 2x) When I want the derivative of x squared with respect to sinx. I mean this: whatever that point x is, I'm gonna find its sine. the specific value of this sine, I will input it into x squared and see what will be tge slope of line on THAT value. So, I take x, I input it into sin function, I get an output, I input this new output into the x squared function, I get a brand new output, and I want the slope of the line on that specific brand new output. I encourage you to watch composite functions videos from precalculus playlist + revise the intro videos on derivative as a concept
@satwikshourya21992 ай бұрын
It means that how does one value change with respect to another meaning , how much y will change if x is changed, for example if you derive postion x with respect to time t, then you get velocity meaning that derivative of x with respect to t is v, so when t has changed a little how much did x change or rather by factor did x change, that factor in this case is velocity v
@fantastic_jarod23915 ай бұрын
Yeah lowkey that explanation kinda sucked first L khan academy vid ive seen
@p.c27504 жыл бұрын
What is the problem with some college/university teachers. is it laziness? I guess it is pride - it seems they dont want subjects to appear simple, too simple for students to suddenly catch what they spent many years to train for. It is not only right, but an honest thing to "call a spade a spade." Thanks KA!
@Jorge-1253 жыл бұрын
Everyone in the comments talking about math stuff while I'm over here trying to count how many times he said respectively. I'm just over here thinking how much respect is in this video.
@lidestudios5094 Жыл бұрын
I only watched this to review, I already know how the chain rule works, but the way he explained it makes it look more complicated than “derivative of outside when x= inside function, times derivative of the inside”
@MatthewReader7 ай бұрын
Any good videos that you thought were a better review?
@thanaa64012 ай бұрын
He just doesn't want us to memorize it thats why he took harder approach
@josuequintero-td5gh6 күн бұрын
Yeah because he's trying to make you understand why it works. Otherwise you're just memorizing formulas without knowing what they do.
@oferzilberman50494 жыл бұрын
I didn't quite understand what does it mean "With respect to something", And quora and google didn't really help, Can someone help me on this? Edit: I figured it out and it turns out it just means it's the x axis but now it can be substitued as other variables like t, So when it's "with respect to something" it means that the y equation is using that variable as the x
@alyssamanwarren83214 жыл бұрын
i don’t either
@Jorge-1253 жыл бұрын
He's paying his respects to the math gods.... Jk, people always use that term and I still don't know why.
@PenandPaperScience3 жыл бұрын
I just uploaded a video where I go through such exercises step-by-step, explaining everything along the way. It might help you. Regarding your question, take this example. 1. The derivative with respect to x of the function x^2 is 2x. 2. The derivative with respect to x of (x+3)^2 needs the chain rule to be solve. 3. The derivative with respect to (x+3) of (x+3)^2 is 2(x+3)
@enternamehere668610 ай бұрын
Would you mind not taking too long to get to the point please
@littlejoestar4 Жыл бұрын
definitely more confused now 😭
@abhilashmishra53973 жыл бұрын
this video just saved me from failing in Physics. Thanks a lot Sal sir
@rajingajadhar4135 Жыл бұрын
Found this channel in grade 12, and I'm coming back to it now in my final year (hopefully) of uni.
@RemotHuman6 күн бұрын
2:25 isn't it the derivative of the whole function with respect to the inner function sin(x) or are you saying that d/d(sin x) (x^2) = 2 sin x I think it should be d/d(sin x) (sin x)^2 = 2 sin x
@ernstboyd874510 күн бұрын
in the case of a linear function (where the function is just multiplying x by a constant) the derivative is just the product of the two derivatives. if f(x) = 5x and g(x) = 10x. then. g(f(x)) = 50x. and (50x)' =. f'(x) * g'(x) = 50 if the outer function is not linear like g(x) = x^2 then the slope changes depending on the input it gets from the inner function f this is why the slope of the g(x) should be evaluated at the same value as it gets from f(x) in other words. (g(f(x)))' = f'(x) *. g'(f(x))
@issac10714 жыл бұрын
Hello, thank you so much for the video, but I have a question please: did the last notation was really treated as a fraction? Regards.
@aimzf204 жыл бұрын
No, it’s not a fraction. However, the way he write the notation can help you to think about the derivatives. They’re not fractions, however it may help you to think about them ‘cancelling’ in this way
@issac10714 жыл бұрын
Thank you Andy F
@ernstboyd874510 күн бұрын
I think the chain rule is easy to explain as a 2 stage amplifier. so (g{f(x))' = f' * g'
@anushreesolanki47823 ай бұрын
If x =at^2 and y=2at, then find d^2y/dx^2. help me with this concept
@OppenheimerUpandcomingАй бұрын
OMG I FINALLY UNDERSTOOD THIS THING THANK U SO MUCH
@hloniphalisa46325 жыл бұрын
I love you so much ,So wish you could be my math lecturer. you are better tan him. thank you so much I was thinking o changing my course but now never all your video you make math easy and simply
@alep.26723 жыл бұрын
I think this one needs a re-do by the same person
@kenonkenkay94266 жыл бұрын
thank you. your video is very clearly to understand, I'm sure it will help me pass my mid-term exam tomorrow. lmao
@ValoriYT5 жыл бұрын
How'd it go?
@spoonyabyss88144 жыл бұрын
Ya dude how’d it go
@ameen55864 жыл бұрын
Bruh
@Jorge-1253 жыл бұрын
2 years later. So how was your graduation?
@Ndiedddd2 жыл бұрын
@@Jorge-125 3 yrs* 😂
@anoobyАй бұрын
dang that actually made sense thx sal
@BoZhaoengineering4 жыл бұрын
This planet needs you! Thank you for the learning videos!
@qualquan2 жыл бұрын
The U substitution of inner x terms is simpler 2nd step is finding dU by differentiating U = dU/dx to express everything in x terms So 2 successive differentiations. "Outer and "inner"" Final result expressed as a differential coeff (DC) as a rule
@tylergust88812 жыл бұрын
It both makes sense and it doesn't make sense... But to be fair I'm still in trig... I don't know too much about the derivatives...
@Syntaxxed5 ай бұрын
all those hours in school vs a 5 min yt video... it keeps happening but I keep being amazed
@sameerpokhrel43794 жыл бұрын
When we take the derivative of the function f(x), we write the derivative as dy/dx but Sal wrote the derivative of h(x) as dh/dx . So ain't we supposed to write the derivative of f(x) as df/dx? Please clear my doubt.
@Andrew-ok9gt4 жыл бұрын
It doesn't matter because f(x) and y are the same thing.
@jamessamuel12554 жыл бұрын
Can write it as either
@jamessamuel12554 жыл бұрын
h(x) can have the derivative h’(x) or dh/dx
@No_BS_policy2 жыл бұрын
y=f(x) ->>> y is a function of x dy/dx ->>> derivative of y with respect to x, same as derivative of f(x) with respect to x or df/dx
@GEORGINA-topic4 ай бұрын
What did u say?
@mohommedameenahmed20992 ай бұрын
Nice
@kennyelliott91642 жыл бұрын
Wouldn’t cos x actually be -cos x because the derivative of sin is -cosx
@ranaAmeer93495 жыл бұрын
Shouldn’t we just use the power rule to get 2 sin(x) and that’s it?!!!
@jamessamuel12554 жыл бұрын
Rola Ahmed yeah I’m confused where the cosx comes in and why
@sophialaird63883 жыл бұрын
Cos x is the derivative of sin x. It’s weird, but yeah
@kshjnbvsmd3 жыл бұрын
@@jamessamuel1255 have you got any idea now, im stuck in the same confusion..
@what54933 жыл бұрын
@@kshjnbvsmd d(f(h))/dx = 2nd line of 4:10 it’s kind of law. If you differentiate it. You want to differentiate of d(f(h)). Firstly if f(h)= (sinx)^2. That means it’s differentiation will be(d/dx (x^n) *d/dx (x). put here x=sinx.
@mattboatman57692 жыл бұрын
Yeah, this is confusing me as well. I get that the derivative of sin x is cos x, but where did the second sin x come from in the first place?
@yaredt43452 жыл бұрын
What is happening here, the math is flowing into me 😁😁😁 this is witchcraft man 👏👏👏👏
@davidsweeney1116 жыл бұрын
You do tend to present calculus in a mechanical way and so all the meaning and understanding is missing...
@GhoshA6 жыл бұрын
David , hmm
@ethanp40506 жыл бұрын
stfu
@snickerdoooodle6 жыл бұрын
"Mechanical way"? What?
@stinkymans50025 жыл бұрын
I actually agree with this. I get very lost in the “derivative x” “du dx” “x x x” He doesn’t give any of it meaning
@hawkmoths5 жыл бұрын
well that's also likely because this is an intro to the chain rule. he is using terms that he likely already explained in a different video.
@SUMANKARANTH-u8y7 ай бұрын
The power/chain rule is the saviour of math
@jonathanlionel37406 жыл бұрын
first comments
@kaylam.62642 жыл бұрын
So I'm still confused as to what the answer is 🤔
@freakinbeast3 жыл бұрын
I was stuck in the same question and he that that question only.
@dazzdazzle87582 жыл бұрын
I wish he had used a simpler function instead of sin x
@becca55014 жыл бұрын
dang, he did such a great job.
@abrueck25186 жыл бұрын
First comment
@rafsanaakterjannat80666 жыл бұрын
great work I don't know that about this
@faythe035 жыл бұрын
thank you!
@xobk3 жыл бұрын
I recommend a new intro to this intro.
@madisonroberts258 Жыл бұрын
Im gonna do great on my test tomorrow
@mysteryspy73 жыл бұрын
why he multiplied with cos x with 2sin x ................ i am stuck up can anyone please help me!
@PenandPaperScience3 жыл бұрын
I just uploaded a video where I solve such exercises step-by-step, explaining everything I do along the way. It might help shed some light :)
@mysteryspy73 жыл бұрын
@@PenandPaperScience 👍
@egregiouslytalented2381 Жыл бұрын
Love this
@6-b-46bsricharan22 жыл бұрын
That's amazing.
@anamikasarkar88622 жыл бұрын
You should have used different colour pen
@ethencubberly50732 жыл бұрын
respect
@JJPMaster4 жыл бұрын
use the chen lu
@l.m46313 жыл бұрын
thank you so much
@amitai820410 ай бұрын
very understandable! thank you!
@konvictz00076 жыл бұрын
Hi Sal, love your videos. Just need to update it to 1080p, will look sharper on bigger screens.
@braden69735 жыл бұрын
Watching this on a 27-inch 4k monitor, Never once noticed the quality. The only thing that matters is the content of the video.
@oddwork21836 жыл бұрын
Great
@adityamukherjee94626 жыл бұрын
I feel like I have already seen this video before tho.
@sameerpokhrel43794 жыл бұрын
Dejavu!!
@bhubneshwarprasad95544 жыл бұрын
Aumsum time
@wasimakram-rs5db6 жыл бұрын
differential geometry a first course by d somasundran PDF mein knsi website sy mily GI???
@bayesian20075 ай бұрын
Perfect explanation.
@GhoshA6 жыл бұрын
Voice and presentation is good .
@ahmetkarakartal95634 жыл бұрын
2:16 did you make a mistake? the answer should be sin2x, isn't it?
@chawza84024 жыл бұрын
I think he is correct. if you see the upper example. you can replace the Sin x with the a, which is the same x but different x value. the first x is a, and the second x is Sin X.
@jeremychamberlain63324 жыл бұрын
You are both correct. By the double angle identity, sin(2x) is the same as his answer of 2(sinx)(cosx)
@mattboatman57692 жыл бұрын
Where does the second "derivative of sin x" come from at 3:06? I thought we had already established that the derivative of (sinx)^2 is 2sinx.
@flying_asparagus12792 жыл бұрын
It's multiplying the outer function times the inner function. If we see sin x as u, then the original function is u^2. So Sal took the derivative of u^2 and got 2u, which is 2sin x. Then he took the derivative of the inner function, sin x, and got cos x. Therefore, the derivative is 2 sin x cos x.
@No_BS_policy2 жыл бұрын
Nah mate, 2sinx is just dh/dsinx. We are interested to know dh/dx which is equal to dh/dsinx * dsinx/dx. Hence, the chain rule is applied.
@doooofus Жыл бұрын
@@flying_asparagus1279 what i find confusing is why we multiply the differential of the outer function with respect to the inner function, by the differential of the inner function with respect to x. i must have learned chain rule years ago now, but coming back to it i realise ive only memorised how to apply it sort of mechanically and dont have an intuitive understanding in my head of why it works that way. Sal doesnt really explain that in the video but just gives us the easy way out of thinking about it in terms of the leibniz notation with the fractions, but even points out that this isnt mathematically rigorous.
@dhruvsingh92435 жыл бұрын
2:24 the differentiation of sin X will be cos X
@janardhansharma94515 жыл бұрын
It will be 2sin x as we are finding derivative w.r.t sin x
@brugamer60316 жыл бұрын
Btw this video doesn’t not help me because its very different with my school work as i know chain rule is UV-UV % V square
@zalida1006 жыл бұрын
That may be a quotient rule you are confusing it with - Sal was explaining the chain rule.