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જો 0 < x <1 તો sqrt(1+x^2)[{xcos(cot^-1 ...

જો `0 < x <1` તો `sqrt(1+x^2)[{xcos(cot^-1 x)+sin(cot^-1 x)}^2-1]^(1/2)`=…......

A

`x/sqrt(1-x^2)`

B

x

C

`x sqrt(1+x^2)`

D

`sqrt(1+x^2)`

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