- #1

- 1,097

- 3

## Homework Statement

See figure attached for problem statement as well as my attempt.

## Homework Equations

## The Attempt at a Solution

I'm stuck as to how to rewrite this sin term.

I know that at n = 1 it will be positive, n = 3 it will be negative, n = 5 it will be positive and so on but how can I rewrite this?