# Tan()

Calculates the tangent of an angle that is entered in radians.

```
Tan( number=number );
```

**Returns:** number

# Arguments

| Argument | Type | Required | Description | Default |
|----------|------|----------|-------------|---------|
| number | number | Yes | Angle, in radians, for which to calculate the tangent. |  |

# Examples

The following code example will output the values returned from the tan() function for the given input value.

```cfml
<cfoutput>#tan(90)#</cfoutput>

```







# Categories

[Numbers](../../categories/number.md), [Math](../../categories/math.md)

# See Also

[numeric.tan()](../objects/numeric/tan.md)