29.3. 1) $$sin\frac{x}{6} = -\frac{1}{2}$$
$$\frac{x}{6} = (-1)^{n+1} \frac{\pi}{6} + \pi n, n \in Z$$
$$x = (-1)^{n+1} \pi + 6\pi n, n \in Z$$
Ответ: $$x = (-1)^{n+1} \pi + 6\pi n, n \in Z$$