# Integration problem

1. Mar 7, 2013

### Government\$

1. The problem statement, all variables and given/known data

Integrate $\int3^x\cos x\,dx$

3. The attempt at a solution

It has to be done using partial integration.

I don't know what should be u?

2. Mar 7, 2013

### pongo38

What choices do you have?

3. Mar 7, 2013

### vela

Staff Emeritus
You're just going to have to try stuff out and see how it works out.