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# MySQL | ATAN2 method

schedule Aug 10, 2023
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MySQL's `ATAN2(~)` method computes the arc tangent of the input values.

# Parameters

1. `X` | `number`

The first number for calculating arc tangent.

2. `Y` | `number`

The second number for calculating the arc tangent.

# Return value

The arc tangent of the input numbers.

# Examples

To return the arc tangent for `1` and `5`:

``` SELECT ATAN2(1, 5); +---------------------+| ATAN2(1, 5) |+---------------------+| 0.19739555984988075 |+---------------------+ ```

To return the arc tangent for `1` and `-5`:

``` SELECT ATAN2(1, -5); +--------------------+| ATAN2(1, -5) |+--------------------+| 2.9441970937399127 |+--------------------+ ```

To return the arc tangent for `-1` and `-5`:

``` SELECT ATAN2(-1, -5); +---------------------+| ATAN2(-1, -5) |+---------------------+| -2.9441970937399127 |+---------------------+ ```
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