Решите уравнение sin2x-sinx=0
Sin 2x - sin x = 0 2sin x * cos x - sin x = 0 sin x * (2cos x - 1) = 0 sin x = 0 x = πk, k ∈ Z 2cos x - 1 = 0 cos x = 1/2 x = ±π/3 + 2πn,n ∈Z