Cos(5x-(π/3)= - √2/2 помогите решить

Question

Cos(5x-(π/3)= - √2/2 помогите решить

Answer 1

Сos(5x-π/3)=-√2/2
5x-π/3=-3π/4+2πn U 5x-π/3=3π/4+2πn
5x=π/3-3π/4+2πn U 5x=π/3+3π/4+2πn
5x=-5π/12+2πn U 5x=13π/12+2πn
x=-π/12+2πn/5,n∈z U x=13π/60+2πn/5,n∈z