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What is (sin x - cos x +1)/(sin x + cos ...

What is `(sin x - cos x +1)/(sin x + cos x -1)` equal to ?

A

`(sin x-1)/(cos x)`

B

`(sin x +1)/(cos x)`

C

`(sin x-1)/(cos x+1)`

D

`(sin x +1)/(cos x +1)`

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