# What is the derivative of #tan^4(3x)#?

##### 1 Answer

Apr 9, 2015

If is helpful (until you really get used to it) to remember and rewrite:

This makes it clear that ultimately (at the last), this is a fourth power function. We'll need the power rule and the chain rule. (Some authors call this combination "The General Power Rule".) In fact we'll need the chain rule twice.