sin x – 2sin2x= 0
sin x -2(2sinx cosx) =0
sin x -2(1-2cos x) = 0
sin x -2 =0
sin x = 2
x = 2 {}
1-2 cos x =0
-2 cos x = -1
cos x = ½
x = {60°,300°}
hp ={60°,300°}
sin x – 2sin2x= 0
sin x -2(2sinx cosx) =0
sin x -2(1-2cos x) = 0
sin x -2 =0
sin x = 2
x = 2 {}
1-2 cos x =0
-2 cos x = -1
cos x = ½
x = {60°,300°}
hp ={60°,300°}