int (sec x dx)/(sqrt(sin (2x + alpha) + ...

`int (sec x dx)/(sqrt(sin (2x + alpha) + sin alpha))`

A

`sqrt(2 sec alpha ( tan x + tan alpha))+c`

B

`sqrt(2 sec alpha ( tan x - tan alpha ))+C`

C

`sqrt(2 sec alpha ( tan alpha - tan x))+c`

D

None of these

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The correct Answer is:

A

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