Найти производную y=4^sin2x /cos^2 x/3

1)1/2cos2x+v3/2sin2x=cos^2x+sin^2x 1/2cos^2x-1/2sin^2x+v3sinxcosx=cos^2x+sin^2x 1,5sin^2x-v3sinxcosx+0,5cos^2x=0, делим на cos^2x 1,5tg^2x-v3tgx+0,5=0 3tg^2x-2v3tgx+1=0 y=tgx 3y^2-2v3y+1=0 (v3y-1)^2=0 v3y=1 y=1/v3=v3/3 tgx=v3/3-> x=pi/6+pi*n 2)cos^2x+sin2x-3sin^2x=0 3sin^2x-2sinxcosx-cos^2x=0, делим на cos^2x: 3tg^2x-2tgx-1=0 y=tgx 3y^2-2y-1=0 y1=-1/3 y2=1 x1=arctg(-1/3)+pi*n x2=pi/4+pi*n 3)1+cos4x=cos2x (cos2x)^2+(sin2x)^2+(cos2x)^2-(sin2x)^2)=cos2x 2(cos2x)^2-cos2x=0 cos2x(2cos2x-1)=0 cos2x=0-> 2x=2pi*n-> x1=pi*n 2cos2x=1-> cos2x=1/2-> 2x=+-pi/6+2pi*n-> x2=+-pi/12+pi*n 4)sin2x/(1-cosx)=2sinx 2sinxcosx=2sinx(1-cosx) sinxcosx=sinx-sinxcosx 2sinxcosx-sinx=0 sinx(2cosx-1)=0 sinx=0-> x1=pi*n 2cosx=1-> cosx=1/2-> x2=+-pi/6+2pi