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Find the derivative of f(tanx) w.r.t. g(...

Find the derivative of `f(tanx)` w.r.t. `g(secx)` at `x=pi/4` , where `f^(prime)(1)=2` and `g^(prime)(sqrt(2))=4` .

A

`1/sqrt2`

B

`sqrt2`

C

1

D

0

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A
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