Find the derivative of the function:

$r=\frac{(1x^{-1})}{\sqrt[\phantom{2}]{1x^2}}$

none of these

$y=\frac{2si{n}^{-1}x}{\sqrt[\phantom{2}]{1-x^2}}$

$r=\frac{8si{n}^{-1}x}{\sqrt[4]{1-x^2}}$

$y=\frac{2co{n}^{-1}}{\sqrt[\phantom{2}]{1-x^2}}$