Помогите решить !!! уравнение sin2x+2sin^2x=0
Sin2x + 2sin^2x = 0 2sinxcosx + 2sin^2x = 0 2sinx* ( cosx + sinx) = 0 2sinx = 0 sinx = 0 x = πk, k ∈ Z sinx + cosx = 0 //: cosx ≠ 0 tgx + 1 = 0 tgx = - 1 x = arctg( - 1) + πk x = - π/4 + πk, k ∈ Z