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

##### 1 Answer

Dec 18, 2014

The derivative of

You can get this result using the **Chain Rule** which is a formula for computing the derivative of the composition of two or more functions in the form:

You can see that the function

Deriving you get:

derivative of

In this case the

First you deal with the cube deriving it but letting the argument

Which is equal to: