int(0)^(pi)[cotx]dx, where [.] denotes t...

`int_(0)^(pi)[cotx]dx,` where [.] denotes the greatest integer function,
is equal to

A

(a) `(pi)/2`

B

(b) `1`

C

(c) `-1`

D

(d) `-(pi)/2`

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The correct Answer is:

D

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