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Asked by Rabin

Prove that:sin(x+2y)+sin(y+2z)+sin(z+2x)=4sin(x-y)/2sin(y-z)/2sin(z-x)2
9 years ago

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Answered by Steve
have you tried the sum-to-product formulas? It looks like they'll do the trick.
9 years ago
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Prove that:sin(x+2y)+sin(y+2z)+sin(z+2x)=4sin(x-y)/2sin(y-z)/2sin(z-x)2

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