Tangent

Evaluate the tangent of a single-precision floating-point number (in radians).

The tangent is defined as

Installation

npm install @stdlib/math-base-special-tanf

Usage

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

tanf( x )

Evaluates the tangent of a single-precision floating-point number (in radians).

var v = tanf( 0.0 );
// returns ~0.0

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

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

v = tanf( NaN );
// returns NaN

Examples

var uniform = require( '@stdlib/random-array-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var PI = require( '@stdlib/constants-float32-pi' );
var tanf = require( '@stdlib/math-base-special-tanf' );

var opts = {
    'dtype': 'float32'
};
var x = uniform( 100, -PI/2.0, PI/2.0, opts );

logEachMap( 'tanf(%0.4f) = %0.4f', x, tanf );

C APIs

Usage

#include "stdlib/math/base/special/tanf.h"

stdlib_base_tanf( x )

Evaluates the tangent of a single-precision floating-point number (in radians).

float y = stdlib_base_tanf( -3.141592653589793f / 4.0f );
// returns ~-1.0f

The function accepts the following arguments:

• x: [in] float input value.

float stdlib_base_tanf( const float x );

Examples

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

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

    float y;
    int i;
    for ( i = 0; i < 5; i++ ) {
        y = stdlib_base_tanf( x[ i ] );
        printf( "tanf(%f) = %f\n", x[ i ], y );
    }
}

Notice

This package is part of 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, see the main project repository.

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Copyright

Copyright © 2016-2026. The Stdlib Authors.