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( a+b + c) [tan ""(A)/(2) + tan "" ( B)/...

` ( a+b + c) [tan ""(A)/(2) + tan "" ( B)/(2) ] = `

A

` 2c cot C//2`

B

`c(cot ""( C)/(2))`

C

` 3c ( cot ""( C)/(2))`

D

` 4c ( cot "" ( C)/(2)) `

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The correct Answer is:
A
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - 1
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