If in a triangle ABC, a=5, b=4 and A=pi/...

If in a triangle ABC, `a=5, b=4 and A=pi/2 +B,`
then the value of `tan ""C/2` is-

A

(a) `(1)/(9)`

B

(b) `tan^(-1)((1)/(40))`

C

(c) Cannot be evaluated

D

(d) `2tan^(-1)(1//9)`

Verified by Experts

The correct Answer is:

D

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