

1/sin^2 x+ sin^2 x*tan^2 x=3
2/ 1+cot2x=(1-cos2x)/sin^2 x
3/ tan(x/2)*cosx-sin2x=0
4/ 6tanx+5cot3x-sin2x=0
5/tanx+tan2x=sin3x/cosx
6/tan2x-sin2x+cos2x-1=0
2/ 1+cot2x=(1-cos2x)/sin^2 x
3/ tan(x/2)*cosx-sin2x=0
4/ 6tanx+5cot3x-sin2x=0
5/tanx+tan2x=sin3x/cosx
6/tan2x-sin2x+cos2x-1=0