Sin(3x+п/3)=sin(x-П/6)

sin(3x+п/3) = sin (x-п/6)3х+п/3=х-п/63х-х = -п/6-п/32х= -п/6-2п/62х = -3п/6 = -п/2х = -п/2:2х=-п/4Ответ: -п/4