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What is (cot A - "cosec"A -1)/(cot A -"c...

What is `(cot A - "cosec"A -1)/(cot A -"cosec"A +1)` equal to?

A

`(1+ cosA)/(sinA)`

B

`(1- cosA)/(sinA)`

C

`-(1+ sinA)/(cos A)`

D

`(1- sinA)/(cos A)`

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