sin6x+sin2x-sin4x=0
2sin 6x+2x/2 .cos 6x-2x/2 -sin4x
2sin 8x/2 cos 4x/2 - sin 4x
2 sin 4x cos 2x -sin 4x
2 sin 4x cos 2x -cos x
2 sin 4x -2sin 2x+x/2 sin 2x-x/2
2 sin 4x -2 sin 3x/2 sin x/2
2 sin 4x -sin 3x/2 sin x/2
Written on March 28, 2018, 1:02 p.m.