Let $f ( x ) = \cos x$ and $g ( x ) = x ^ { 2 } - 1$. (a) Find the coordinates of any points of intersection of $f$ and $g$. (b) Find the area bounded by $f$ and $g$. (c) Find the volume generated when the region in part (b) is rotated around the $y$-axis.
: \left\{ \begin{array} { l }
Let $f ( x ) = \cos x$ and $g ( x ) = x ^ { 2 } - 1$.
(a) Find the coordinates of any points of intersection of $f$ and $g$.
(b) Find the area bounded by $f$ and $g$.
(c) Find the volume generated when the region in part (b) is rotated around the $y$-axis.