Решите тригонометрические уравнения
1) Sin3x = 1/2 3x = (-1)^n arcSin(1/2) + nπ, n ∈ Z 3x = (-1)^n* π/6 + nπ, n ∈ Z x = (-1)^n*π/18 + nπ/3, n ∈Z 2) Cosx/2 = -1/2 x/2 = +-arcCos(-1/2) + 2πk , k ∈ Z x/2 = +-2π/3 + 2πk , k ∈ Z x = +-4π/3 + 4πk , k ∈ Z