02_07_ex_26.tex

{$f(x) =\sin(\cos^{-1} x)$
}
{\begin{enumerate}
\item		$f(x) = \sqrt{1-x^2}$, so $\fp(x) = \frac{-x}{\sqrt{1-x^2}}$
\item		$\fp(x) = \cos (\cos^{-1}x)(\frac{1}{\sqrt{1-x^2}} =\frac{-x}{\sqrt{1-x^2}}$
\end{enumerate}
}