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product rule within chain rule.

I forgot a power of 2 on the first sin *

Bro which one are you referring to

The first blue term in the original product rule that I wrote out.

x^3.
Bringing the power down and subtracting by one gives us,
3x^2
right? :o

I am talking about the power of sin not x

Remember now we differantiating the second part of the expression or whatever

I wasn't talking about that one.
I was doing the other term.

The second one will be a lil more complicated, I wanted to make sure you got the first part.

ah yea you got a point :D That one I didnt notice :D ok

What we do this only for the second part if I may ask

Just need to understand whats the difference that forces us to do so

why*

if I have this (y5x)^2
Will I take chain rule for derivative?

(5x)^2 *** ignore the fact that I can just do it 25x^2 lets say I COULDNT. Will I use chain rule?

The chain rule can be really tricky to get a handle on.
Lemme know if you need another example.

My own solution is 3x^2sin^2(5x)+2x^3sin(5x)cos(5x)

oh sh*t there is a 5 too hold on

3x^2sin^2(5x)+10x^3sin(5x)cos(5x)

yea

but still the manual doesn't end up with any cos

ooh so thats why

Not important for my course, im glad my way is correct too, thanks again

np c: