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If 0<(x)<(pi/4) , then sec2x-tan2x=...

If `0<(x)<(pi/4)` , then `sec2x-tan2x=`

A

1) `tan(x-pi/4)`

B

2) `tan(pi/4-x)`

C

3) `tan(x+pi/4)`

D

4) `tan^2(x+pi/4)`

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