- #1

Crush1986

- 207

- 10

## Homework Statement

I need to find the Laurent Series of [tex] Cos[\frac{1}{z}] [/tex] at z=0

## Homework Equations

None

## The Attempt at a Solution

I've gone through a lot of these problems and this is one of the last on the problem set. With all the other trig functions it's been just computing their Taylor series, then just simplifying the terms of the problem. Usually, I'd have to do like a geometric series in there as well.

This function though I'm having trouble with because f(0) doesn't exist. I'm not sure what else I can do. Can anyone point me in the right direction?

Thanks.