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If theta is an acute angle and sin"" ( t...

If `theta` is an acute angle and `sin"" ( theta )/( 2) = sqrt((x-1)/( 2x)) ` then `tan theta ` is equal to

A

`x^(2)-1`

B

`sqrt(x^(2)-1)`

C

`sqrt(x^(2)+1)`

D

`x^(2)+1`

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The correct Answer is:
B
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