deg2rad

Convert an angle from degrees to radians.

Installation

npm install @stdlib/math-base-special-deg2rad

Usage

var deg2rad = require( '@stdlib/math-base-special-deg2rad' );

deg2rad( x )

Converts an angle from degrees to radians.

var r = deg2rad( 90.0 );
// returns ~1.571

r = deg2rad( -45.0 );
// returns ~-0.785

r = deg2rad( NaN );
// returns NaN

Examples

var randu = require( '@stdlib/random-base-randu' );
var deg2rad = require( '@stdlib/math-base-special-deg2rad' );

var d;
var r;
var i;

for ( i = 0; i < 100; i++ ) {
    d = (randu()*720.0) - 360.0;
    r = deg2rad( d );
    console.log( 'degrees: %d => radians: %d', d, r );
}

C APIs

Usage

#include "stdlib/math/base/special/deg2rad.h"

stdlib_base_deg2rad( x )

Converts an angle from degrees to radians.

double y = stdlib_base_deg2rad( 90.0 );
// returns ~1.571

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_deg2rad( const double x );

Examples

#include "stdlib/math/base/special/deg2rad.h"
#include <stdio.h>

int main( void ) {
    const double x[] = { 45.0, 90.0, 0.0, 0.0/0.0 };

    double y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = stdlib_base_deg2rad( x[ i ] );
        printf( "deg2rad(%lf) = %lf\n", x[ i ], y );
    }
}

See Also

• @stdlib/math-base/special/rad2deg: convert an angle from radians to degrees.

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 © 2016-2024. The Stdlib Authors.