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" 14.Prove that "cot A+cot B+cot C=(a^(2...

" 14.Prove that "cot A+cot B+cot C=(a^(2)+b^(2)+c^(2))/(4Delta)

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4Delta(cot A+cot B+cot C)=a^(2)+b^(2)+c^(2)

With usual notations,prove that in a triangle ABC cot A+cot B+cot C=(a^(2)+b^(2)+c^(2))/(4Delta)

In DeltaABC , prove that: cot\ A/2+cot\ B/2+cot\ C/2=((a+b+c)^(2))/(4Delta)

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