can someone explain this step??
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Answer:
sin 2x - sin 4x + sin 6x = 0
( sin 6x + sin 2x ) - sin 4x = 0
( we know sin x + sin y = 2 sin ( x+y / 2 ) cos ( x - y / 2 ) )
= 2 sin (6x +2x /2 ) cos (6x - 2x / 2 ) - sin 4x = 0
= 2 sin 4x cos 2x - sin 4x = 0
Step-by-step explanation:
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