cos²x+cosx=sin²x помогите плиз))

cos²x + cosx = sin²xcos²x - sin²x + cosx =0cos2x + cosx =02cos(3x/2) cos(x/2) = 03x/2 = π/2 + πn, n ∈ Z3x=π+2πn, n ∈ Zx=π/3 + 2πn/3, n ∈ Zcos (x/2) = 0x/2 = π/2 + πn, n ∈ Zx=π + 2πn,n ∈ Z