If $\cos x + \cos 2x + \cos 3x = 3,$ then find $\sin x + \sin 2x + \sin 3x.$
Question:
If $\cos x + \cos 2x + \cos 3x = 3,$ then find $\sin x + \sin 2x + \sin 3x.$
Answer:
Let's think step by step.

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If $\cos x + \cos 2x + \cos 3x = 3,$ then find $\sin x + \sin 2x + \sin 3x.$
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