int(sqrt(1+cosx)dx equals...

`int(sqrt(1+cosx)dx` equals

A

`2sqrt(2)sin (x/2)+c`

B

`-2sqrt(2)sin(x/2)+c`

C

`-2sqrt(2)cos(x/2)+c`

D

`2sqrt(2)cos(x/2)+c`

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The correct Answer is:

A

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