---
title: math.tan() function
description: math.tan() returns the tangent of the radian argument x.
url: https://docs.influxdata.com/flux/v0/stdlib/math/tan/
estimated_tokens: 890
product: Flux
version: v0
publisher: InfluxData
canonical: https://docs.influxdata.com/flux/v0/stdlib/math/tan/
date: '2024-04-08T16:01:02-06:00'
lastmod: '2024-04-08T16:01:02-06:00'
---

* Flux 0.22.0+

InfluxDB support

`math.tan()` returns the tangent of the radian argument `x`.

##### Function type signature

```js
(x: float) => float
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### x

(Required)
Value to operate on.

## Examples

* [Return the tangent of a radian value](#return-the-tangent-of-a-radian-value)
* [Use math.tan in map](#use-mathtan-in-map)

### Return the tangent of a radian value

```
import "math"

math.tan(x: 3.14)// -0.001592654936407223

```

### Use math.tan in map

```js
import "math"
import "sampledata"

sampledata.float()
    |> map(fn: (r) => ({r with _value: math.tan(x: r._value)}))
```

[](#view-example-input-and-output)

View example input and output

#### Input data

|       \_time       |\*tag|\_value|
|--------------------|-----|-------|
|2021-01-01T00:00:00Z| t1  |\-2.18 |
|2021-01-01T00:00:10Z| t1  | 10.92 |
|2021-01-01T00:00:20Z| t1  | 7.35  |
|2021-01-01T00:00:30Z| t1  | 17.53 |
|2021-01-01T00:00:40Z| t1  | 15.23 |
|2021-01-01T00:00:50Z| t1  | 4.43  |

|       \_time       |\*tag|\_value|
|--------------------|-----|-------|
|2021-01-01T00:00:00Z| t2  | 19.85 |
|2021-01-01T00:00:10Z| t2  | 4.97  |
|2021-01-01T00:00:20Z| t2  |\-3.75 |
|2021-01-01T00:00:30Z| t2  | 19.77 |
|2021-01-01T00:00:40Z| t2  | 13.86 |
|2021-01-01T00:00:50Z| t2  | 1.86  |

#### Output data

|       \_time       |      \_value       |\*tag|
|--------------------|--------------------|-----|
|2021-01-01T00:00:00Z| 1.4332105287001917 | t1  |
|2021-01-01T00:00:10Z| 13.206812562189944 | t1  |
|2021-01-01T00:00:20Z| 1.8132901361470621 | t1  |
|2021-01-01T00:00:30Z|\-3.8961501504145963| t1  |
|2021-01-01T00:00:40Z|\-0.5180248236402568| t1  |
|2021-01-01T00:00:50Z| 3.446580763443108  | t1  |

|       \_time       |      \_value       |\*tag|
|--------------------|--------------------|-----|
|2021-01-01T00:00:00Z| 1.5589299766884657 | t2  |
|2021-01-01T00:00:10Z|\-3.7955688539089367| t2  |
|2021-01-01T00:00:20Z|\-0.6965508511114601| t2  |
|2021-01-01T00:00:30Z| 1.3144743689586664 | t2  |
|2021-01-01T00:00:40Z| 3.515068256260714  | t2  |
|2021-01-01T00:00:50Z|\-3.3608276755646553| t2  |
| _time | *tag | _value |
| --- | --- | --- |
| _time | *tag | _value |
| 2021-01-01T00:00:00Z | t1 | -2.18 |
| 2021-01-01T00:00:10Z | t1 | 10.92 |
| 2021-01-01T00:00:20Z | t1 | 7.35 |
| 2021-01-01T00:00:30Z | t1 | 17.53 |
| 2021-01-01T00:00:40Z | t1 | 15.23 |
| 2021-01-01T00:00:50Z | t1 | 4.43 |

| _time | *tag | _value |
| --- | --- | --- |
| _time | *tag | _value |
| 2021-01-01T00:00:00Z | t2 | 19.85 |
| 2021-01-01T00:00:10Z | t2 | 4.97 |
| 2021-01-01T00:00:20Z | t2 | -3.75 |
| 2021-01-01T00:00:30Z | t2 | 19.77 |
| 2021-01-01T00:00:40Z | t2 | 13.86 |
| 2021-01-01T00:00:50Z | t2 | 1.86 |

| _time | _value | *tag |
| --- | --- | --- |
| _time | _value | *tag |
| 2021-01-01T00:00:00Z | 1.4332105287001917 | t1 |
| 2021-01-01T00:00:10Z | 13.206812562189944 | t1 |
| 2021-01-01T00:00:20Z | 1.8132901361470621 | t1 |
| 2021-01-01T00:00:30Z | -3.8961501504145963 | t1 |
| 2021-01-01T00:00:40Z | -0.5180248236402568 | t1 |
| 2021-01-01T00:00:50Z | 3.446580763443108 | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| _time | _value | *tag |
| 2021-01-01T00:00:00Z | 1.5589299766884657 | t2 |
| 2021-01-01T00:00:10Z | -3.7955688539089367 | t2 |
| 2021-01-01T00:00:20Z | -0.6965508511114601 | t2 |
| 2021-01-01T00:00:30Z | 1.3144743689586664 | t2 |
| 2021-01-01T00:00:40Z | 3.515068256260714 | t2 |
| 2021-01-01T00:00:50Z | -3.3608276755646553 | t2 |