id like some help deriving certain functions using the chain rule(adsbygoogle = window.adsbygoogle || []).push({});

the way our teacher does it is different from what the textbook says

he derives the outermost functions before getting to the innermost functions, this is where

i get confused =(

for example

f(x) = sincos(5x)

i get

f'(x) = (coscos(5x)) (-sin(5x)) (5)

= -5coscos(5x)sin(5x)

im not sure if this is right

another question:

f(x) = sin^4(2x) + cos^4(2x)

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# Derivatives using chain rule

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