# Help in finding the Laurent Series in a given annulus

• November 13th 2012, 07:46 AM
alphabeta89
Help in finding the Laurent Series in a given annulus
Let $f(z) =\frac{z}{(1-z)\sin z}$. Find the Laurent series of $f(z)$ such that the series is valid in the annulus $\pi<|z|<2\pi$

How do I start? Thanks in advance!
• November 13th 2012, 01:46 PM
hedi
Re: Help in finding the Laurent Series in a given annulus
A suggestion is attached.