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Suppose o lt t lt (pi)/(2) and sin ...

Suppose `o lt t lt (pi)/(2)` and sin ` t + cos t =1/5` then ` tan "" t/2 ` is equal to

A

`2 sec x `

B

` 2 cos x `

C

` sec x`

D

` cos x `

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The correct Answer is:
A
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