Question

cos(x-п/3)=-0,5
как решить?

Answer 1

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.