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In a ΔABC, prove thatsin3 A cos (B−C)+sin3 B cos (C−A)+sin3 C cos (A−B)=3 sin A sin B sin C |
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Answer» In a ΔABC, prove thatsin3 A cos (B−C)+sin3 B cos (C−A)+sin3 C cos (A−B)=3 sin A sin B sin C |
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