1/2*cosx-sqrt(3)/2sinx=sqrt(3)/2
cos(60+x)=sqrt(3)/2
pi/3+x=+-pi/6+2pik
x=+-pi/6-pi/3+2pik
x1=-pi/6+2pik
x2=-pi/2+2pik
1/2*cosx-sqrt(3)/2sinx=sqrt(3)/2
cos(60+x)=sqrt(3)/2
pi/3+x=+-pi/6+2pik
x=+-pi/6-pi/3+2pik
x1=-pi/6+2pik
x2=-pi/2+2pik