---
title: math.Cos
description: Returns the cosine of the given radian number.
categories: []
keywords: []
params:
  functions_and_methods:
    aliases: []
    returnType: float64
    signatures: [math.Cos VALUE]
---

{{< new-in 0.130.0 />}}

```go-html-template
{{ math.Cos 1 }} → 0.5403023058681398
```