Your videos are the reason why I'm getting a degree and not dropping out
@kathlEen0kp0p
11 жыл бұрын
Even Sal can't help me on this one... I am doomed
@avinashgupta1834
7 жыл бұрын
lol
@SeptemusHeap
9 жыл бұрын
Why did it take me so long to find this channel? Wow, my life is about to change.
@roshanamir5675
6 жыл бұрын
I feel like all this substituting just made it much more confusing
@mmartinez8549
11 жыл бұрын
all i can think about is how perfect the line thickness is
@keltonlewis528
9 жыл бұрын
I'd love it if I could pause and rewind my own professor... Mostly pause.
@mintbrownieangelfish-6114
4 жыл бұрын
Yeah, that's the only way I'm understanding my calc teacher. He records every lecture and posts it for us. I have to watch every lecture twice to get it, and because I have another chance to learn it I don't need to worry about notes during class. I can focus on understanding the lesson. I think all college math teachers should do it.
@Blindcide1987
14 жыл бұрын
Awesome, thanks a lot. You do a great job of explaining where the rules we're using come from.
@TheGabrielSavage
11 жыл бұрын
These videos should reeeallly be in the calc playlist on the khan site.... why aren't they? :/
@nichap7
12 жыл бұрын
Mr. Khan, I love you! Thanks for being my new favorite APBIO & APCALC teacher!
@asherstreets533
3 жыл бұрын
Why the product rule with (-1) exponent vs. quotient rule? (Also, the a-b-c substitution seems muddier than just applying core differentiation rules with x/y.)
@superdupe8
12 жыл бұрын
i understand the mechanics of it, but i wish someone could tell me why all the "with respects to" and da/db's are really neccessary
@orlinaurum2373
4 жыл бұрын
This is 7 years late but 3blue1brown made a video visualizing how the chain rule works.
@NoChance1909
11 жыл бұрын
Thank you Sal! They should put your name next to mine on my diploma, really don't think I'd have made it this far without your videos.
@TheBlackLungDisease
13 жыл бұрын
Why is it that there are hardly any videos explaining step-by-step with examples on how to find the inverse derivative of a function? There are about a million on inverse trig derivatives, but not just normal functions.
@coconutjelly
12 жыл бұрын
this is a lot easier to understand then what my teacher teach at school.
@johnnymiramontes2754
7 жыл бұрын
I feel as a first year calc student you're throwing too many things to follow at once haha.
@stfrankies240
12 жыл бұрын
waoh! thanks khan,u made it so easy and better
@sarahkaveh7739
4 жыл бұрын
Oh gosh i just love the new pens and colors😢😍
@KevZyro
12 жыл бұрын
The reason why it seems he overcomplicates it is because he's trying to really get the intuition of the chain rule across with these problems, not just rush through it because he definitely could have reduced the amount of work needed to solve this.
@stevefordawinboi7098
5 жыл бұрын
I understand this already, but I feel like all the substitution will confuse newer students
@sarishaharrichand566
4 жыл бұрын
You are literally saving my life! Lol thank you
@eccaprata23
13 жыл бұрын
isnt the derivative of tanx, sec^2x?? where did the 1/cos^2 come from?
@93MHD
14 жыл бұрын
That's good, he no longer uses MS paint!
@Seguris
13 жыл бұрын
Ever wondering why this has a lower amount of views, substitutions aren't necessary, the normal method wouldn't be 'confusing'. It seems like that's the thing you are really paranoid about others experiencing when watching your videos, Its good to think this way, but it can blind you and make you think that you're actually making it easier when using methods that were easier for you when learning. However it ends up being complex for others that may not think similarly. nice effort though.
@xrandomteenx
11 жыл бұрын
Isn' the derivative of tanx, sec^2x ?
@shivanibiswal3269
5 жыл бұрын
Reggie Escobar that’s the same as 1/cos^2x
@GabrielAlves-cl6oc
10 жыл бұрын
Well, it's kind of an old video but let me point it out anyway. I'm not sure if I missed something but you turned -y^-2 into -x/y^2, shouldn't be -1/y^2?
@sirdank7692
10 жыл бұрын
-y^-2 was being multiplied by x, so it was simplified to -x/y^2.
@gilfer88
12 жыл бұрын
I freaking love your videos
@pokemonfanrock1
9 жыл бұрын
I'm understanding everything but i still can't seem to find the use of all this. Yes i get that it's a formula to find the slope at any point in the curve but how can i use this in something practical?
@lolzomgz1337
9 жыл бұрын
That depends entirely on what you work as / want to work as? It probably wont be used in every day life. But it's used a lot in building/physics/medicine etc.
@pokemonfanrock1
9 жыл бұрын
lolzomgz1337 Yes, i know that, but where exactly in building/physics/medicine? I just want an example of where i can use this, so that i can invent some problems on my own that would have some meaning instead of just being "find the implicit derivative of the function bleh"
@lolzomgz1337
9 жыл бұрын
pokemonfanrock1 Okay, if you are trying to work out the acceleration of something in physics, you can plot velocity against time and differentiate the line. That answers gives you a formula for acceleration at that point. Also, if you're plotting displacement against time you can get velocity from the same method. Understanding acoustics and harmonics also requires differentiation, since they can be molded as waves of Frequency against Displacement, and from that you can work out wavelength to analyse sound. In medicine it's used to work out dosage and other things, but I'm not really well versed in that.
@pokemonfanrock1
9 жыл бұрын
lolzomgz1337 Awesome! Thank you very much, truly! You da man
@lolzomgz1337
9 жыл бұрын
pokemonfanrock1 No problem. :)
@ImaCactusHugMe
13 жыл бұрын
Thank you so much, this solved my problem!
@twizted8469
8 жыл бұрын
Anyone else get dy/dx as -1+x/y^3 ? After simplifying the final bit, i used sec2 instead of 1/cos2
@TeptZonic
13 жыл бұрын
You should do some inverse trig implicit differentiation problems.
@Pow3rGaming
11 жыл бұрын
Thank you very much for your help!
@bigaspn
11 жыл бұрын
hello i am a little confused on the way you wrote it. my book says (ysec^2(x/y)-y^2)-(y^2+xsec^2(x/y) can you make a do the converion from your cos^2 to sec^2 please? thank you
@garfieldcatgc
12 жыл бұрын
just thinking if in math we have a forward operation then we must have a backwards operation, so how would you anti-differentiate an ugly equation like that o.O
@dagharr2
12 жыл бұрын
@7:20 .. is this not an incorrect use of parenthesis? 1/cos^2(x/y) doesn't distribute over the whole left side, does it? hope someone can help as I'm a bit confused. thanks.
@insanesoul2400
4 жыл бұрын
I think so too. He took cos as a common value where it is not in this case. I got suck there too
@Zaroctys
15 жыл бұрын
Very helpful. Thanks!
@sarahkaveh7739
4 жыл бұрын
Why is d tanb/db=1/cos squared of b??????i mean dear khan you didnt mentioned or proved it before:))))
@sarahkaveh7739
4 жыл бұрын
Nobody here?????????? Plz anser sb I really need it:((((((
@akashhellrider3446
8 жыл бұрын
too confusing
@Bloodsaberxy
15 жыл бұрын
great new interface sal! no more writing over letters ^_^
@sanrafaa
12 жыл бұрын
Hi Sir... Can you create a separate channel for "General Aptitude" problems...???
@raulrobben10
11 жыл бұрын
i got lost at 7:20 :( shouldn't he use the product ? he just multiplied the 2 derivetives
@prolarka
14 жыл бұрын
maybe u should check the previous videos to understand him
@xrandomteenx
11 жыл бұрын
Didn't understand anything .________.
@Raghoodiie
13 жыл бұрын
Like what "would0ukindly" said, you're complicating things majorly!
@coronapalaciosmiguel8179
4 жыл бұрын
i did it the way i was told, and ihave diferent answer
@Jiri_yolo
12 жыл бұрын
the backward operation is called 'Integration'
@Seguris
13 жыл бұрын
@lilshortypie72 Yes that may be the case for you, but I don't understand why people like you, think everyone else is like you.
@deltasworder1x
13 жыл бұрын
o.O.....*confusion*
@beatsbydrew6445
10 жыл бұрын
Ok this makes absolutely no sense can you justify your steps please?!
@jeffwilken7241
7 жыл бұрын
Oh my God, way too many letters.
@beatsbydrew6445
10 жыл бұрын
I mean seriously!
@gonzaloayalaibarre
10 жыл бұрын
Bro, focus, bro, you're not following, bro.
@TTGxCROTTY
9 жыл бұрын
Gonzalo Ayala Ibarre you made me giggle
@Peglegkickboxer
11 жыл бұрын
this explanation makes sense but it's just poorly laid out and is just different in comparison to what other lessons from different (and most) school teach. I would recommend PatrickJMT, his calc explanations are clearer, a little faster and he teaches in a simpler and more common way.
@KeyOfAm
13 жыл бұрын
This was vid was kind of confusing o_O
@emojitunes
10 жыл бұрын
This is the worst Khan video ever made.
@lolzomgz1337
9 жыл бұрын
Why?
@mkutkarsh
6 жыл бұрын
not at all
@deonisiusdenis2142
6 жыл бұрын
actually i agree, other videos on this subject much more comprehensive...
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