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[" In a triangle "ABC,sin^(3)A cos(B-C)+...

[" In a triangle "ABC,sin^(3)A cos(B-C)+sin^(3)B cos(C-A)+sin^(3)C cos(A-B)" is equal to "],[[" A) "3cos A cos B cos C," (B) "3sin A sin B sin C],[" C) "2cos A cos B,cos C," (D) "2sin A sin B sin C]]

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