2cos^2(6x)=2sin^2(6x)+sqrt(3)
2(cos^2(6x)-2sin^2(6x))=sqrt(3)
2cos(12x)=sqrt(3)
cos(12x)=sqrt(3)/2
12x=+-arccos(sqrt(3)/2+2*pi*n
12x=+- pi/6+2*pi*n
x=+-pi/72+pi*n/6
2cos^2(6x)=2sin^2(6x)+sqrt(3)
2(cos^2(6x)-2sin^2(6x))=sqrt(3)
2cos(12x)=sqrt(3)
cos(12x)=sqrt(3)/2
12x=+-arccos(sqrt(3)/2+2*pi*n
12x=+- pi/6+2*pi*n
x=+-pi/72+pi*n/6