\function{math.sin()} and \function{math.cos()} have always required
input values measured in radians. (Contributed by Raymond Hettinger.)
-\item Three new functions, \function{getpgid()}, \function{killpg()},
-and \function{mknod()}, were added to the \module{posix} module that
+\item Four new functions, \function{getpgid()}, \function{killpg()}, \function{lchown()}, and \function{mknod()}, were added to the \module{posix} module that
underlies the \module{os} module. (Contributed by Gustavo Niemeyer
and Geert Jansen.)