solve sin 2x - sin 4 x + sin 6x equal to zero
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sin 2x - sin 4x + sin 6x =0
sin 2x + sin 2x = 0
2 sin 2x = sin 90. ( sin 90 = 0)
2 ( 2x) = 90
4x = 90
x = 22.5
sin 2x + sin 2x = 0
2 sin 2x = sin 90. ( sin 90 = 0)
2 ( 2x) = 90
4x = 90
x = 22.5
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