No worries, just simplify using a trig identity
Today I got stuck on a group of similar problems and wanted to present an example of one.
I have have the following problem
The way I solve it is the following:
Using the chain rule over and over again...
Wolframalpha tells me the answer is:
Did I not simplify correctly? Din't use the product rule at some point?
I'm still a bit confused of which rules to use.