Question

Решить уравнение cos(x-π/6)=-1/2

Answer 1

cos(x-pi/6)=-1/2
x-pi/6=+-arccos(-1/2)+2pin
x-pi/6=+-(pi-arccos(1/2))+2pin
x-pi/6=+-(pi-pi/3)+2pin
x-pi/6=+-2pi/3+2pin
x=+-2pi/3+pi/6+2pin