ATAN2

Returns the arc tangent of the two variables x and y. It is similar to calculating the arc tangent of y / x, except that the signs of both arguments are used to determine the quadrant of the result. ATAN(y, x) is a synonym for ATAN2(y, x).

Syntax

ATAN2(y, x)
ATAN(y, x)

Arguments

Arguments	Description
y	The angle, in radians.
x	The angle, in radians.

Return Type

A Float64 data type value.

Examples

mysql> SELECT ATAN2(-2, 2);
+---------------------+
| ATAN2((- 2), 2)     |
+---------------------+
| -0.7853981633974483 |
+---------------------+
1 row in set (0.01 sec)