# ACOS

```
ACOS(numExpr)
```

Returns the trigonometric arc cosine of an expression.

Available in:

| Processors | SQL Studio |
| ---------- | ---------- |
| ✓          | ✓          |

*Sample code:*

```sql
USE `kafka`;
SELECT ACOS(extra) 
FROM nyc-yellow-taxi-trip
LIMIT 1;
```

*Output:*

```json
{
  "value": {
    "ACOS": "1.0471975511965979"
  }
}
```