How to count beyond $2\pi$?

Question

How do I count beyond $2\pi$ if I make another one full circle? Mainly I want to know what will come in place of $\pi/6$, $\pi/2$ and so on.

Answer 1

Add them to $2\pi$ by finding a common denominator, for example $$2\pi + \frac{\pi}{6} = \frac{12\pi}{6} + \frac{\pi}{6} = \frac{13\pi}{6}.$$