Added degrees() and radians() to mathmodule. Closing patch 552452 and

feature request 426539.

Doc/lib/libmath.tex

@@ -47,6 +47,10 @@ Return the cosine of \var{x}.
 Return the hyperbolic cosine of \var{x}.
 \end{funcdesc}
 
+\begin{funcdesc}{degrees}{x}
+Converts angle \var{x} from radians to degrees.
+\end{funcdesc}
+
 \begin{funcdesc}{exp}{x}
 Return \code{e**\var{x}}.
 \end{funcdesc}
@@ -99,6 +103,10 @@ carry the sign of \var{x}.  The integer part is returned as a float.
 Return \code{\var{x}**\var{y}}.
 \end{funcdesc}
 
+\begin{funcdesc}{radians}{x}
+Converts angle \var{x} from degrees to radians.
+\end{funcdesc}
+
 \begin{funcdesc}{sin}{x}
 Return the sine of \var{x}.
 \end{funcdesc}