1/2sinx+sqrt(3)/2cosx=1/2 cos(x-П/6)=1/2 x-п/6=+-П/3+2Пk x1=П/6+П/3+2Пk=П/2+2Пk (-3П/2;П/2;5П/2;) x2=П/6-П/3+2пk=-П/6+2Пk (-П/6;11П/6; 23П/6)