# Simple Integral. I'm a bit rusty.

1. Sep 6, 2010

### maherelharake

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

Take the integral of
1/[(z^2 + x^2) ^ 3/2] dx where z is a constant.

2. Relevant equations

3. The attempt at a solution

I tried substitution, but couldn't get it to work. Thanks in advance.

2. Sep 6, 2010

### rock.freak667

Have you tried x=ztanθ ?

3. Sep 6, 2010

### maherelharake

Yes but I was confused on the next step. I tried to look into trig substitutions.

4. Sep 6, 2010

### rock.freak667

Could you post your entire working?

5. Sep 6, 2010

### maherelharake

Oh, never mind I think I just figured it out. Thanks for your help!