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 |
+---------------------+
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