Question

How do you solve the equation `4costheta=1+2costheta`?

Answer 1

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

Explanation:

the given equation is equivalent to the following:

`4costheta-2costheta=1`

that's:

`2costheta=1`

`costheta=1/2`

and therefore

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