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In Delta ABC, if B=90^@ then tan""A/2=...

In `Delta ABC, if B=90^@` then `tan""A/2=`

A

` sqrt(( b+c)/( b-c)) `

B

` sqrt(( b-c)/( b+c) ) `

C

` sqrt( ( a+c)/( a-c))`

D

` sqrt( ( a-c)/( a+c))`

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The correct Answer is:
B
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