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" 24.Prove that "a^(3)cos(B-C)+b^(3)cos(...

" 24.Prove that "a^(3)cos(B-C)+b^(3)cos(C-A)+c^(3)cos(:A-B)=3abc

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In any triangle ABC, prove that: a^(3)cos(B-C)+b^(3)cos(C-A)+c^(3)cos(A-B)=3abc

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In any DeltaABC , prove that a^(3)cos(B-C)+b^(3)cos(C-A)+c^(3)cos(A-B)=3abc

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