If 0 lt theta lt (pi)/(2) and (y+1)/(1-y...

If `0 lt theta lt (pi)/(2) and (y+1)/(1-y) =sqrt((1+ sin theta)/( 1- sin theta)),` then y is equal to

A

`cot ""theta/2`

B

`tan "" theta /2`

C

`cot ""theta/2 + tan ""theta /2`

D

`cot "" theta /2 -tan "" theta /2`

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The correct Answer is:

B

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