(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Hey guys.

I have this problem:

http://img12.imageshack.us/img12/6729/91881544.jpg [Broken]

It's like a two parts problem.

The first one was to prove the equation in red, I did that with a bit of trigo.

The second part is to use the integral of the function in green to prove the thing in yellow. I'm stuck on the path that goes from - epsilon to epsilon, that semi circle, how can I find the value of this function on the path?

Thanks.

2. Relevant equations

3. The attempt at a solution

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# A tough integral

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