1.

Iftanalpha = b/a, a gt b gt 0 andif0 ltalpha lt (pi)/(4), thensqrt((a+b)/(a-b))- sqrt((a-b)/(a+b)) isequalto

Answer»

`(2 SIN alpha)/( sqrt(cos2 alpha ))`
`(2 cosalpha)/( sqrt(cos 2 alpha))`
`(2 sin alpha)/( sqrt(sin 2 alpha))`
`(2 cosalpha)/( sqrt( sin 2 alpha))`

ANSWER :A


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