- #1
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id like some help deriving certain functions using the chain rule
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)
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)