diff --git a/source/sec-circular-traversing.xml b/source/sec-circular-traversing.xml
index f49a746f..6e8add06 100755
--- a/source/sec-circular-traversing.xml
+++ b/source/sec-circular-traversing.xml
@@ -307,7 +307,7 @@
- Circular functions have several standard features. The function has a midline that is the line for which half the points on the curve lie above the line and half the points on the curve lie below. A circular function's amplitude is the maximum deviation of the function value from the midline; the amplitude corresponds to the radius of the circle that generates the function. Circular functions also repeat themselves, and we call the smallest value of p for which f(x+p) = f(x) for all x the period of the function. The period of a circular function corresponds to the circumference of the circle that generates the function.
+ Circular functions have several standard features. The function has a midline that is the line for which half the points on the curve lie above the line and half the points on the curve lie below. A circular function's amplitude is the maximum deviation of the function value from the midline; the amplitude corresponds to the radius of the circle that generates the function. Circular functions also repeat themselves, and we call the smallest value of p for which f(x+p) = f(x) for all x the period of the function. The period of a circular function corresponds to the circumference of the circle that generates the function.