The expression of (cottheta+"cosec"the...

The expression of `(cottheta+"cosec"theta-1)/(cottheta-"cosec"theta+1)` is equal to

A

`(1+costheta)/(sintheta)`

B

`(1-costheta)/(sintheta)`

C

`(cottheta+1)/("cosec" theta)`

D

`(cot theta-1)/("cosec"theta)`

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