If the area of a triangle ABC is given b...

If the area of a triangle ABC is given by `Delta=a^(2)-(b-c)^(2)`, then `tan.(A)/(2)` is equal to

A

(a) `-1`

B

(b) 0

C

(c) `(1)/(4)`

D

(d) `(1)/(2)`

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The correct Answer is:

C

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