cos(x-п/3)=-0,5
как решить?

Cos(x - п/3) = -0,5(x - п/3) = Arc cos(-0,5)x₁ = ((-2π/3) + 2πk) + (π/3) = (-π/3) + 2πk, k∈Z.x₂ =  ((2π/3) + 2πk) + (π/3) = π + 2πk = π(1 + 2k), k∈Z.