Решите уравнение:
sin3x - sinx = 0

Решениеsin3x - sinx = 02sin(3x - x)/2 * cos(3x + x)/2 = 0sinx * cos2x = 01) sinx = 0x = πk, k∈Z2)  cos2x = 02x = π/2 + πn, n∈zx = π/4 + πn/2, n∈Z