1.

If a,b,c are the sides of a Delta ABC, which are in A.P.,then cot"" ( C )/( 2) equals :

Answer»

`3 tan "" ( A)/(2)`
`3 tan ""( B )/( 2)`
`3 COT"" ( A)/( 2)`
`3 cot ""( B)/(2)`

Answer :A


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