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If intsec2x dx=f{g(x)}+c then...

If `intsec2x dx=f{g(x)}+c` then

A

Domain of `f(x)=R-{0}`

B

Range of `g(x)=R`

C

`f'(x)=(1)/(2x) for all x in R^(+)`

D

`g'(x)=-cosec^(2)((pi)/(4)-x)`

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