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In triangle ABC, CD is the bisector of t...

In triangle ABC, CD is the bisector of the angle C. if `cos.(C)/(2) = (1)/(3) and CD = 6`, then find the value of `((1)/(a) + (1)/(b))`

A

`(a+b)/(2ab) cos "" C/2`

B

`(a+b)/(ab ) cos "" C/2`

C

`(2ab)/(a +b) cos ""C/2`

D

`(b sin A)/(sin (B + (C )/(2)))`

Text Solution

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The correct Answer is:
C, D
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