# Line integral

1. Apr 30, 2009

### -EquinoX-

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

http://img245.imageshack.us/img245/7355/lineintegral.th.jpg [Broken]

2. Relevant equations

3. The attempt at a solution

My attempt is first to apply green's theorem and then I got $$3(x^2+y^2)$$, which is
$$3(r^2)$$. And then I integrate:

$$3 \int_0^{\pi/4} \int_0^3 r^2 r dr d\theta$$

is this correct?

Last edited by a moderator: May 4, 2017
2. Apr 30, 2009

### benorin

Yes, that is correct.