docs-v2/content/flux/v0/stdlib/math/tan.md

title	description	menu	weight
math.tan() function	`math.tan()` returns the tangent of the radian argument `x`.	flux_v0_ref name parent identifier math.tan math math/tan	101

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

Function type signature

(x: float) => float

{{% caption %}} For more information, see Function type signatures. {{% /caption %}}

Parameters

x

({{< req >}}) Value to operate on.

Examples

• Return the tangent of a radian value
• Use math.tan in map

Return the tangent of a radian value

import "math"

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

Use math.tan in map

import "math"
import "sampledata"

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

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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

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