@stdlib/math-base-special-rad2deg

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rad2deg

Convert an angle from radians to degrees.

Installation

npm install @stdlib/math-base-special-rad2deg

Usage

var rad2deg = require( '@stdlib/math-base-special-rad2deg' );

rad2deg( x )

Converts an angle from radians to degrees.

var d = rad2deg( 3.141592653589793/2.0 );
// returns 90.0

d = rad2deg( -3.141592653589793/4.0 );
// returns -45.0

d = rad2deg( NaN );
// returns NaN

Notes

• Due to finite precision, canonical values may not be returned. For example,

  var d = rad2deg( 3.141592653589793/6.0 );
  // returns 29.999999999999996

Examples

var randu = require( '@stdlib/random-base-randu' );
var TWO_PI = require( '@stdlib/constants-float64-two-pi' );
var rad2deg = require( '@stdlib/math-base-special-rad2deg' );

var r;
var d;
var i;

for ( i = 0; i < 100; i++ ) {
    r = randu() * TWO_PI;
    d = rad2deg( r );
    console.log( 'radians: %d => degrees: %d', r, d );
}

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C APIs

Usage

#include "stdlib/math/base/special/rad2deg.h"

stdlib_base_rad2deg( x )

Converts an angle from radians to degrees.

double x = 3.141592653589793/2.0;
double d = stdlib_base_rad2deg( x );
// returns 90.0

x = -3.141592653589793/4.0;
d = stdlib_base_rad2deg( x );
// returns -45.0

The function accepts the following arguments:

• x: [in] double input value (in radians).

double stdlib_base_rad2deg( const double x );

Examples

#include "stdlib/math/base/special/rad2deg.h"
#include "stdlib/constants/float64/two_pi.h"
#include <stdlib.h>
#include <stdio.h>

int main( void ) {
    double x;
    double d;
    int i;

    for ( i = 0; i < 100; i++ ) {
        x = (double)rand() / (double)RAND_MAX * STDLIB_CONSTANT_FLOAT64_TWO_PI;
        d = stdlib_base_rad2deg( x );
        printf( "radians: %lf => degrees: %lf\n", x, d );
    }
}

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See Also

• @stdlib/math-base/special/deg2rad: convert an angle from degrees to radians.

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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

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.