[tex] \sin(x) = - 0.5 \\ x_{1} = - \frac{\pi}{6} + 2\pi n \:, \: n \: \epsilon \:z \\ x_{2} = \frac{7\pi}{6} + 2\pi n \: , \: n \: \epsilon \: z[/tex]

Ответ: 1)