Add ducumentation for atan2 function
@@ -528,6 +528,12 @@ Arc Tangent Function (``atan()``) : ``atan(expr0)``
Creates a new expression which is everywhere the arc tangent of its
argument. The returned value is in *radians*.
+.. _Arc_Tangent_2_Expression_Function:
+
+Arc Tangent 2 Function (``atan2()``) : ``atan2(expr0,expr1)``
+ Creates a new expression which is everywhere the arc tangent of its
+ arguments. The returned value is in *radians*.
+
.. _Cosine_Expression_Function:
Cosine Function (``cos()``) : ``cos(expr0)``
