In a DeltaABC, if 2s=a+b+cand(s-b)(s-c)=...

In a `DeltaABC`, if `2s=a+b+cand(s-b)(s-c)=xsin^(2).(A)/(2)`, then `x = `

A

(a) bc

B

(b) ca

C

(c) ab

D

(d) abc

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The correct Answer is:

A

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