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[" In a triangle "ABC" if "cot(A)/(2)*co...

[" In a triangle "ABC" if "cot(A)/(2)*cot(B)/(2)=c,cot(B)/(2),cot(C)/(2)=a" and "cot(C)/(2)*cot(A)/(2)=b" then "],[(1)/(s-a)+(1)/(s-b)+(1)/(s-c)=]

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