Syntax
ATAN(X)
Purpose
You can call this function to return the arc tangent of X.
Examples
obclient> SELECT ATAN(-10), ATAN(0), ATAN(10), ATAN(-0.5), ATAN(0.5);
+---------------------+---------+--------------------+---------------------+--------------------+
ATAN(-10) ATAN(0) ATAN(10) ATAN(-0.5) ATAN(0.5)
+---------------------+---------+--------------------+---------------------+--------------------+
-1.4711276743037347 0 1.4711276743037347 -0.4636476090008061 0.4636476090008061
+---------------------+---------+--------------------+---------------------+--------------------+
1 row in set (0.01 sec)