# Homework Help: Calculating the principal value of an Integral

1. Oct 2, 2011

### Demon117

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

$P.v.\int e^{itx}/(x^{2}-k^{2})dx$

Where, $t,k\in Reals$ and the range of integration is $-\infty$ to $\infty$.

2. Relevant equations

Not sure.

3. The attempt at a solution

I tried to find a solution to this problem by looking at the residues in each plane, but it seems that this is incorrect. Does one just take the real part/imaginary part of the integral? This is something I don't quite understand and I have no experience with. Could someone please give me some pointers/advice on these types of problems?