> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://help.sigmacomputing.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://help.sigmacomputing.com/_mcp/server.

# Acos

> Use the Sigma Acos function to compute the arccosine of the given angle.

The **Acos** function computes the arccosine of the given angle.

## Syntax

`Acos(value)`

Function arguments:

* **value** (required) - The value whose arccosine will be calculated.

## Related resources

* [Cos](/docs/cos)