ATAN2

Declaration

ATAN2(X,Y)

Description

Returns the arctangent of X and Y. It is similar to computing the arctangent of Y/X, with the signs of both parameters used to determine the quadrant of the result.

This function can also be written as ATAN(X,Y). See ATAN.

Examples

SELECT ATAN(PI(),0);
+--------------------+
| ATAN(PI(),0)       |
+--------------------+
| 1.5707963267948966 |
+--------------------+
1 row in set (0.001 sec)