Added missing entry for cmath.
diff --git a/Doc/lib/libmisc.tex b/Doc/lib/libmisc.tex
index 04be32b..2493e32 100644
--- a/Doc/lib/libmisc.tex
+++ b/Doc/lib/libmisc.tex
@@ -8,6 +8,9 @@
 \item[math]
 --- Mathematical functions (\code{sin()} etc.).
 
+\item[cmath]
+--- Mathematical functions for complex numbers.
+
 \item[whrandom]
 --- Floating point pseudo-random number generator.