<summary> About stdlib... </summary>

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Tangent

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]

Evaluate the [tangent][tangent] of a number.

The [tangent][tangent] is defined as

$Tangent definition.$

## Installation

bash
npm install @stdlib/math-base-special-tan

## Usage

javascript
var tan = require( '@stdlib/math-base-special-tan' );

#### tan( x ) Evaluates the [tangent][tangent] of a number (in radians).

javascript
var v = tan( 0.0 );
// returns ~0.0

v = tan( -3.141592653589793/4.0 );
// returns ~-1.0

v = tan( 3.141592653589793/4.0 );
// returns ~1.0

v = tan( NaN );
// returns NaN

## Examples

javascript
var linspace = require( '@stdlib/array-base-linspace' );
var PI = require( '@stdlib/constants-float64-pi' );
var tan = require( '@stdlib/math-base-special-tan' );

var x = linspace( -PI/2.0, PI/2.0, 100 );

var i;
for ( i = 0; i < x.length; i++ ) {
    console.log( tan( x[ i ] ) );
}

## C APIs

### Usage

c
#include "stdlib/math/base/special/tan.h"

#### stdlib_base_tan( x ) Evaluates the [tangent][tangent] of a number (in radians).

c
double y = stdlib_base_tan( -3.141592653589793 / 4.0 );
// returns ~-1.0

The function accepts the following arguments: - x: [in] double input value.

c
double stdlib_base_tan( const double x );

### Examples

c
#include "stdlib/math/base/special/tan.h"
#include <stdio.h>

int main( void ) {
    const double x[] = { 0.0, 0.523, 0.785, 1.047, 3.14 };

    double y;
    int i;
    for ( i = 0; i < 5; i++ ) {
        y = stdlib_base_tan( x[ i ] );
        printf( "tan(%lf) = %lf\n", x[ i ], y );
    }
}

* ## See Also - [@stdlib/math-base/special/cos][@stdlib/math/base/special/cos]: compute the cosine of a number. - [@stdlib/math-base/special/sin][@stdlib/math/base/special/sin]: compute the sine of a number.

* ## Notice This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more. For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib]. #### Community [![Chat][chat-image]][chat-url] --- ## Copyright Copyright © 2016-2024. The Stdlib [Authors][stdlib-authors].

Package detail

readme

Tangent