`int(cosx-1)/(cosx+1)dx=`

A

(a) `2tan""x/2-x+c`

B

(b) `1/2tan""x/2-x+c`

C

(c) `x-1/2tan""x/2+c`

D

(d) `x-2tan""x/2+c`

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The correct Answer is:

D

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