Question

СРОЧНО!!!!! решите уравнение

Answer 1

$\cos (\frac{\pi}{3} -2x)=0.5\\ \\ \frac{\pi}{3} -2x=\pm\arccos(0.5)+2\pi n,n \in Z\\ \\ \frac{\pi}{3} -2x=\pm \frac{\pi}{3}+2\pi n,n \in Z\\ \\ -2x=\pm\frac{\pi}{3} -\frac{\pi}{3} +2\pi n,n \in Z|:(-2)\\ \\ x=\mp\frac{\pi}{5}+\frac{\pi}{6} -2\pi n,n \in Z$