Question

Решить уравнение:
3 sin^2x + sinX * cosX=0

Answer 1

sin x*(3sin x + cos x) = 0
1) sin x = 0; x1 = Π*k
2) 3sin x + cos x = 0
3sin x = -cos x
tg x = -1/3
x2 = -arctg(1/3) + Π*n