add hypot()
diff --git a/Doc/lib/libmath.tex b/Doc/lib/libmath.tex
index 62da689..c26e849 100644
--- a/Doc/lib/libmath.tex
+++ b/Doc/lib/libmath.tex
@@ -19,6 +19,7 @@
 \funcline{floor}{x}
 \funcline{fmod}{x, y}
 \funcline{frexp}{x}
+\funcline{hypot}{x, y}
 \funcline{ldexp}{x, y}
 \funcline{log}{x}
 \funcline{log10}{x}
diff --git a/Doc/libmath.tex b/Doc/libmath.tex
index 62da689..c26e849 100644
--- a/Doc/libmath.tex
+++ b/Doc/libmath.tex
@@ -19,6 +19,7 @@
 \funcline{floor}{x}
 \funcline{fmod}{x, y}
 \funcline{frexp}{x}
+\funcline{hypot}{x, y}
 \funcline{ldexp}{x, y}
 \funcline{log}{x}
 \funcline{log10}{x}