# TAN

The TAN function calculates the tangent of a given angle.

## Syntax

`TAN(angle)`

### Parameters

#### angle

The angle for which the tangent is to be calculated. The angle should be in radians. If the angle is `null`, the function will return `null`.

## Examples

```esql
ROW a=1.8
| EVAL tan=TAN(a)
```

```esql
ROW angle=0.5
| EVAL tangent = TAN(angle)
```
