# Cauchy integral

1. Jun 17, 2014

### jiho.j

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

∫$\frac{tan(\frac{z}{2})}{(z+\frac{\pi}{2})(z-\frac{\pi}{2})^{2}}$ dz

integration along C: abs(z) = 4

(along the circle of radius is 4)

2. Relevant equations

Cauchy Integral Formula

3. The attempt at a solution

I tried to set g(z) that is analytic inside C but I cannt set it.

Do I have to use Laurent seires or residue or something?

2. Jun 17, 2014

### CAF123

Yes, nothing comes to mind quickly for you to use the Cauchy Integral formula. It should be fine using residues though.