Question

Find all values of θ, if θ is in the interval [0, 360°) and has the given function value.

Answer 1

Given

$\cos \theta=\frac{1}{2}$

Answer

$\begin{gathered} \cos \theta=\frac{1}{2} \\ \theta=60^{\circ} \\ \theta=180^{\circ}+60^{\circ} \\ \theta=240^{\circ} \end{gathered}$

So

$\theta=60,240$