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माना alpha =2tan^(-1)1/2 + sin^(-1)3/5 ...

माना `alpha =2tan^(-1)1/2 + sin^(-1)3/5` तथा `beta = sin^(-1) 12/13 + cos^(-1)4/5 + cos^(-1)16/63` इस प्रकार है `2 sin alpha` इस प्रकार है कि `2 sin alpha` एवं `cos beta` समीकरण `x^(2)-ax+b=0` के मूल है, जहाँ `a, b in R` है।
`tan^(-1)(sec(cos^(-1)(sin alpha/2))-1)` का मान है|

A

`pi/4`

B

`pi/2`

C

`beta/2`

D

`beta/4`

लिखित उत्तर

Verified by Experts

The correct Answer is:
A
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