1.

( cot ""(A)/(2) + cot ""(B)/(2)+ cot ""( C )/( 2))/(cot A + cot B + cot C ) =

Answer»

` (( a+B+C)^(2))/( a^(2) + b^(2) +c^(2))`
` ( a+b+c)/( a^(2) + b^(2) +c^(2))`
` ( a+b+c)/( a^(3) + b^(3) +c^(3))`
` ( a^(2) +b^(2) +c^(2) )/(( a + b +c)^(2))`

ANSWER :A


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