- #1

- 58

- 0

I am having a difficult time working with some of these infinite series. I studied them in calc 2, but that was a few years ago.

Could someone help me figure out how to find what the following sum converges to:

[tex]

\sum_{n=-N}^N{cos(n \theta)}

[/tex]

Shouldn't there be some property or convergence test I could do to find out what it actually converges to?

Could someone help me figure out how to find what the following sum converges to:

[tex]

\sum_{n=-N}^N{cos(n \theta)}

[/tex]

Shouldn't there be some property or convergence test I could do to find out what it actually converges to?

Last edited: