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If 32 sin^6(x)=10-15 cos(2x) + b cos(4x) + a cos(6x), then how do we prove that tan(x)tan(5x)=(a+b-5)/(a-b+7)? |
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Answer» If 32 sin^6(x)=10-15 cos(2x) + b cos(4x) + a cos(6x), then how do we prove that tan(x)tan(5x)=(a+b-5)/(a-b+7)? |
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