# ATAN2

## Syntax

```sql
ATAN(Y,X), ATAN2(Y,X)
```

## Description

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.

## Examples

```sql
SELECT ATAN(-2,2);
+---------------------+
| ATAN(-2,2)          |
+---------------------+
| -0.7853981633974483 |
+---------------------+

SELECT ATAN2(PI(),0);
+--------------------+
| ATAN2(PI(),0)      |
+--------------------+
| 1.5707963267948966 |
+--------------------+
```

<sub>*This page is licensed: GPLv2, originally from*</sub> [<sub>*fill\_help\_tables.sql*</sub>](https://github.com/MariaDB/server/blob/main/scripts/fill_help_tables.sql)

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