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Evaluate: intsqrt(1+2cotx(cotx+cosecx))d...

Evaluate: `intsqrt(1+2cotx(cotx+cosecx))dx`

A

`2lncos.(x)/(2)+C`

B

`2lnsin.(x)/(2)+C`

C

`(1)/(2)lncos.(x)/(2)+C`

D

`(1)/(2)lnsin.(x)/(2)+C`

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