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If f^(prime)(1)=-2sqrt(2)a n dg^(prime)(...

If `f^(prime)(1)=-2sqrt(2)a n dg^(prime)(sqrt(2))=4` , then the derivative of `f(tanx)` with respect to `g(secx)` at `x=pi/4,` is 1 (b) `-1` (c) 2 (d) 4

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