# Integral problem

1. Feb 26, 2009

### orthovector

does anybody know how to take this integral???

$$\int \frac{dx}_{({x^2 + a^2})^{3/2}}$$

2. Feb 26, 2009

### csprof2000

Not too bad.

Just use a trig substitution. let x = a tan Q, and then it works out nicely.

3. Feb 27, 2009

### orthovector

well, look at that...!

thanks!

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