cos(2x+П/6)+(корень из 3)/2=0
x=
2x+П/6 = ± 5pi/6 +2pik
2x = ± 5pi/6 -pi/6 +2pik /:2
x = ± 5pi/12 - pi/12 +pik
1) x = 5pi/12-pi/12+pik
x = pi/3 + pik, k∈z
2) x = -5pi/12 -pi/12 +pik
x = -pi/2 +pik, k∈z