Решите уравнение tgx = 2sinx.

tg x = 2sin x

sin x / cos x = 2sin x

sin x (1/cos x - 2) = 0

sin x = 0 или 1/cos x = 2

x = πn, n ∈ Z или cos x = 1/2

x = ±π/3 + 2πk, k ∈ Z