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**1. The problem statement, all variables and given/known data**

Use Polar coordinates to evaluate

_{0}in the complex plane

**3. The attempt at a solution**

I've only used polar integrals to convert an integral in sin and cos into one in therms of z, find the residues and then use the residue theorum to evaluate the integral so I am not really sure where to go with this question? Any help would be greatly appreciated!