Question # 2 lol. I don't know why I'm having such a hard time getting this....
Determine the derivative of the following fuction:
g(x) = (cosx)^3
I started by using the power rule to come up with:
g '(x) = 3(cosx)^2
According to my book this is wrong though... it has:
g '(x) = (3(cosx)^2)(-sinx)
Which makes no sense to me. Thanks again.