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

I am looking for a closed form of the summation:

sin(x) + sin(3x) + sin(5x) + ... + sin((2n-1*)x)

2. Relevant equations

None.

3. The attempt at a solution

Through a complete stroke of luck, I believe I have arrived at the correct solution: sin^2(nx)/sin(x)

I have tested this for many different cases, and I believe it is correct. However, I am having a hard time proving that it is. Can anybody point me in the right direction?

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# Homework Help: Closed form of a summation

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