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Let U=sin^(-1)((2x)/(1+x^2)) and V=tan^(...

Let `U=sin^(-1)((2x)/(1+x^2))` and `V=tan^(-1)((2x)/(1-x^2))` , then `(d U)/(d V)=`
(a)`1//2`
(b) `x`
(c) `(1-x^2)/(1+x^2)`
(d) 1

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