Buttaro
Monday, 12 August 2013
How to solve $\sin x \cdot\sin 2x\cdot\sin 3x + \cos x\cdot\cos 2x\cdot\cos 3x =1$
How to solve $\sin x \cdot\sin 2x\cdot\sin 3x + \cos x\cdot\cos
2x\cdot\cos 3x =1$
How to solve $\sin x \cdot\sin 2x\cdot\sin 3x + \cos x\cdot\cos
2x\cdot\cos 3x =1$
I don't know the solution for this. Help me!
Thank all!
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