use imperative
diff --git a/Doc/library/math.rst b/Doc/library/math.rst
index 562388e..22d2316 100644
--- a/Doc/library/math.rst
+++ b/Doc/library/math.rst
@@ -280,12 +280,12 @@
 
 .. function:: degrees(x)
 
-   Converts angle *x* from radians to degrees.
+   Convert angle *x* from radians to degrees.
 
 
 .. function:: radians(x)
 
-   Converts angle *x* from degrees to radians.
+   Convert angle *x* from degrees to radians.
 
 
 Hyperbolic functions