Question

How do you find two solutions of the equations `sectheta=2`?

Answer 1

The solutions are `S={pi/3+2kpi,-pi/3+2kpi}`, `k in ZZ`

Explanation:

If `sectheta=2`

Then, `costheta=1/2`

`theta=pi/3+2kpi`

or `theta =-pi/3+2kpi`