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

Hey guys.

So, I need to calculate this integral, I uploaded what I tried to do in the pic.

But according to them, this is not the right answer, according to them, the right answer is the one I marked in red at the bottom.

Any idea where this Sin came from?

Thanks.

2. Relevant equations

3. The attempt at a solution

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# Complex analysis

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