I need solve this integral, and I tried various methods of solving and did not get it. The integral is:
$$\frac{1}{2\pi}\int_{0}^{2\pi}\frac{1}{1-2t\cos\theta +t^2}d\theta,$$
where $t$ is a positive integer.
I need solve this integral, and I tried various methods of solving and did not get it. The integral is:
$$\frac{1}{2\pi}\int_{0}^{2\pi}\frac{1}{1-2t\cos\theta +t^2}d\theta,$$
where $t$ is a positive integer.