Find general solution of sin2x + sin4x + sin6x = 0

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sin2x + sin4x + sin6x = 0
prove that sin 6x + sin 2x = 2sin 4x cos 2x
find the general solution of the equation sin2x sin4x sin6x 0
find the general solution of sin2x − sin4x + sin6x = 0
#math #trigonometry
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