# How do you find the derivative of #y=cos(x^2)# ?

##### 1 Answer

Aug 6, 2014

We will need to employ the chain rule.

The chain rule states:

In other words, just treat

We know that the derivative of

(if those identities look unfamiliar to you, I may direct you to this page or this page, which have videos for the derivative of

Anyhow, by the power rule, we now have:

Simplify a bit: