sin(pix/6) = -√3/2
pix/6=t
sint=-√3/2
t=-pi/3+2pik . k=z
t=-2pi/3+2pik . k=z
Найдем х:
1)pix/6=-pi/3+2pik
x=-2+12k
2)pix/6=-2pi/3+2pik
x=-4+12k
