Differentiate $f(x)=\sqrt[\phantom{2}]{1-x^2},$ where $-\frac{x}{\sqrt[\phantom{2}]{1-x^2}}-\frac{1}{\sqrt[\phantom{2}]{1-x^2}}si{n}^{-1}(x)\frac{1}{2\sqrt[\phantom{2}]{1-x^2}}-1.$

$-\frac{x}{\sqrt[\phantom{2}]{1-x^2}}$

$-\frac{1}{\sqrt[\phantom{2}]{1-x^2}}$

$si{n}^{-1}(x)$

$\frac{1}{2\sqrt[\phantom{2}]{1-x^2}}$