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If x=secphi -tanphi and y="cosec" phi+c...

If `x=secphi -tanphi and y="cosec" phi+cotphi`, then show that `xy+x-y+1=0.`

A

`x=(y+1)/(y-1)`

B

`x=(y-1)/(y+1)`

C

`y=(1+x)/(1-x)`

D

`xy+x-y+1=0`

Text Solution

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B, C, D
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