int(dx)/(1-cosx-sinx) is equal to...

`int(dx)/(1-cosx-sinx)` is equal to

`log|1+cot (x/2)|+c`

`log|1-tan (x/2)|+c`

`log|1-cot(x/2)|+c`

`log|1+tan(x/2)|+c`

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The correct Answer is:

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