Question

Solve the inequalities:
$\cos x\le 1/2$

Answer 1

$\cos \le 1/2$

We know that $\cos x=\frac{1}{2}$ when $x=\pi /3$ or $2\pi -\left(\pi /3\right)=5\pi /3$

Hence $\cos x\le 1/2$

Where $xϵ[\pi /3,5\pi /3]$.