(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

2. Relevant equations

I hope there's someone who can help me with the following:

I have to calculate the integral over C (the unit cicle) of (z+(1/z))^n dz, where z is a complex number.

3. The attempt at a solution

I tried to use the subtitution z=e^(i*theta), so you get

(z+(1/z))^n dz=(2*i*Sin(theta))^n * i*e^(i*theta) dtheta

but then I get stuck.

Is this the right way, and if, how do I proceed. And if it isn't, how should I do it???

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Complex integral

**Physics Forums | Science Articles, Homework Help, Discussion**