Originally Posted by
mybrohshi5 f(x)=tan(5x)
find f'(x) and f"(x)
so i found f'(x) to be 5*sec^2(5x)
i am having trouble finding f"(x)
i thought it was 25*sec^2(5x)*tan^2(5x) but it wrong.
could i get some help with the second derivative please =)
thank you
chad