- Thread starter
- #1

Question:

$$\text{Show that the coefficient }C_n \text{in the Laurent expansion of }$$

$$f(z)=(z+\frac{1}{z}) \text{ about z=0 is given by}$$

$$C_n=\frac{1}{2\pi}\int^{2\pi}_0 \cos(2cos(\theta))cos(n\theta)\, d\theta ,n\in\mathbb{z}$$