---
id: acos
title: acos Function
sidebar_label: acos
slug: /help/docs/search/search-query-language/math-expressions/acos/
canonical: https://www.sumologic.com/help/docs/search/search-query-language/math-expressions/acos/
---

Returns the inverse cosine of the argument.

## Syntax

`acos(<x>) as <field>`

## Example

```sumo
* | acos(1) as v
```