## Syntax
```mermaid
%%{init: {
'theme': 'base',
'flowchart': { 'padding': '7', 'nodeSpacing': '20', 'rankSpacing': '20' },
'themeVariables': {
'fontSize': '11px',
'fontFamily': 'Arial'
}
}}%%
flowchart LR
Start((START)) --> COS[COS]:::quoted
COS --> End((END))
```
## Purpose
The `COS` SQL function returns the cosine of the provided angle.
See also [[ACOS]].
Parameters:
- Input (`decimal`): the angle to get the cosine of.
Returns: A number which represents the cosine of the provided angle as `decimal`.
## Examples
`COS` retrieves the cosine of the angle 0:
```sql
select cos(0)
--------
1
```