int \ (1+cot^2x)/(1+cotx) \ dx...

`int \ (1+cot^2x)/(1+cotx) \ dx`

A

`- log (1 + cot x )+c`

B

`log (1 + tan x) +c`

C

`log (1 + cot x )+c`

D

`log cot x+c`

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The correct Answer is:

A

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