Question

решите уравнение
cos(pi/3-2x)=-1

Answer 1

$Cos( frac{ pi }{3} -2x)= - 1$
$Cos(2x - frac{ pi }{3})=-1$
$2x- frac{ pi }{3} = pi +2 pi n,n$∈ z
$2x = frac{ pi }{3}+ pi +2 pi n,n$∈ z
$2x = frac{4 pi }{3} +2 pi n,n$∈ z
$x = frac{2 pi }{3} + pi n,n$∈ z