- #1

Vitani1

- 51

- 9

- TL;DR Summary
- I'm having trouble beginning this...

I'm trying to get from the formula in the top to the formula in the bottom (See image: Series). My approach was to complexify the sine term and then use the fact that (see image: Series 1) for the infinite sum of 1/ne^-n. Then use the identity (see image: Series 2). Any other ideas?