If y=cot^(-1)(cotx), then (dy)/(dx) is...

If `y=cot^(-1)(cotx),` then `(dy)/(dx)` is

A

`1,x"inR`

B

`1,x"inR-{npi}`

C

`{{:(1",",x inR-{npi}),("does not exist", x in{npi},nin "integer" ):}`

D

None of these

Verified by Experts

The correct Answer is:

C

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