cosdf

Computes the cosine of a single-precision floating-point number (in degrees).

Installation

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

Usage

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

cosdf( x )

Computes the cosine of a single-precision floating-point number (in degrees).

var v = cosdf( 0.0 );
// returns 1.0

v = cosdf( 60.0 );
// returns ~0.5

v = cosdf( 90.0 );
// returns 0.0

v = cosdf( NaN );
// returns NaN

Examples

var uniform = require( '@stdlib/random-array-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var cosdf = require( '@stdlib/math-base-special-cosdf' );

var opts = {
    'dtype': 'float32'
};
var x = uniform( 100, -180, 180, opts );

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

C APIs

Usage

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

stdlib_base_cosdf( x )

Computes the cosine of a single-precision floating-point number (in degrees).

float out = stdlib_base_cosdf( 0.0f );
// returns 1.0f

out = stdlib_base_cosdf( 60.0f );
// returns ~0.5f

The function accepts the following arguments:

• x: [in] float input value.

float stdlib_base_cosdf( const float x );

Examples

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

int main( void ) {
    const float x[] = { 0.0f, 30.0f, 45.0f, 60.0f, 90.0f };

    float y;
    int i;
    for ( i = 0; i < 5; i++ ) {
        y = stdlib_base_cosdf( x[ i ] );
        printf( "cosdf(%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.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2026. The Stdlib Authors.