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

Evaluate the sum

[tex]\sum_{n=0}^N\frac{\cos{n\theta}}{\sin^n{\theta}}[/tex]

2. Relevant equations

3. The attempt at a solution

In class we evaluated [tex]\sum_{n=0}^N\cos{n\theta}[/tex] and [tex]\sum_{n=0}^N\sin{n\theta}[/tex], by expanding them as the real and imaginary parts of a geometric series. However, I can't quite seem to figure out to use that for this question. Could someone give me a bump in the right direction?

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# Homework Help: Tricky sum

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