2sin x cos x -cosx= 2sinx - 1
2sin x cos x - 2sin x -(cos x-1)=0
(2sin x-1)(cos x-1)=0
2sin x-1=0 cos x -1=0
2sin x =1 cos x=1
sin x=1/2 cos x=1.
2sin x cos x -cosx= 2sinx - 1
2sin x cos x - 2sin x -(cos x-1)=0
(2sin x-1)(cos x-1)=0
2sin x-1=0 cos x -1=0
2sin x =1 cos x=1
sin x=1/2 cos x=1.
