---
title: math.Atan2
description: Returns the arctangent, in radians, of the given number pair, determining the correct quadrant from their signs.
categories: []
keywords: []
action:
  aliases: []
  related:
    - functions/math/Atan
    - functions/math/Asin
    - functions/math/Acos
    - functions/math/Pi
    - functions/math/Sin
    - functions/math/Cos
    - functions/math/Tan
  returnType: float64
  signatures: [math.Atan2 VALUE VALUE]
---

{{< new-in 0.130.0 >}}

```go-html-template
{{ math.Atan2 1 2 }} → 0.4636476090008061
```