Question

find the principal soluction of the following equation cosx=1÷2

Answer 1

I hope this answer help you

Answer 2

$\cos(x) = 1 \div 2 \\ \cos(x) = \frac{1}{2} \\ \cos(x) = \cos( \frac{\pi}{3} ) \\ x = 2n\pi + - \frac{\pi}{3}$