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If alpha is in first quadrant such that ...

If `alpha` is in first quadrant such that `tan^(2)alpha=(8)/(7)`, then the value of `((1+sinalpha)(1-sinalpha))/((1+cosalpha)(1-cosalpha))`

A

`(7)/(8)`

B

`(8)/(7)`

C

`(7)/(4)`

D

`(64)/(49)`

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The correct Answer is:
A
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