Cos(3π/2 - 0.5x)=0.5
Cos(3π/2 - 0.5x) = 0.5 -cos 0.5x = 0.5 cos 0.5x = -0.5 1) 0.5x = 2π/3 + 2πk → x1 = 4π/3 + 4πk 2) 0.5x = -2π/3 + 2πk → x2 = -4π/3 + 4πk Ответ: х = +- 4π/3 + 4πk (k∈Z)