In in a triangle ABC, sides a,b,c are in...

In in a `triangle ABC`, sides a,b,c are in A.P. then `tan""A/2 tan""C/2`

A

`(2)/(3) cot.(A)/(2)`

B

`(2)/(3)cot.(B)/(2)`

C

`(2)/(3)cot.(C )/(2)`

D

None of these

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The correct Answer is:

B

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