# TAN

The TAN function returns the tangent of a given angle, where the angle is specified in radians.

## Syntax

`TAN(angle)`

### Parameters

#### angle

An angle in radians. If the value is `null`, the function returns `null`.

## Examples

Calculates the tangent of the value in column `a` (which is set to 1.8 radians) and stores the result in a new column called `tan`:

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