# How do you find the derivative of #y= sin(xcosx)#?

##### 1 Answer

May 24, 2015

There are two ways I can think of to do this. Substitution, or just thinking as you go.

**1)**

If you want to make this look nicer, you can write this as:

where

Then,

So, substituting that back in, we get:

**2)**

Or, you can just take the derivative and do the chain rule as you go.