Hacovercosine

Compute the half-value coversed cosine.

The half-value coversed cosine is defined as

Installation

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

Usage

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

hacovercos( x )

Computes the half-value coversed cosine (in radians).

var v = hacovercos( 0.0 );
// returns 0.5

v = hacovercos( 3.141592653589793/2.0 );
// returns 1.0

v = hacovercos( -3.141592653589793/6.0 );
// returns 0.25

Examples

var linspace = require( '@stdlib/array-base-linspace' );
var TWO_PI = require( '@stdlib/constants-float64-two-pi' );
var hacovercos = require( '@stdlib/math-base-special-hacovercos' );

var x = linspace( 0.0, TWO_PI, 100 );

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

C APIs

Usage

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

stdlib_base_hacovercos( x )

Computes the half-value coversed cosine (in radians).

double out = stdlib_base_hacovercos( 0.0 );
// returns 0.5

out = stdlib_base_hacovercos( 3.141592653589793 / 2.0 );
// returns 1.0

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_hacovercos( const double x );

Examples

#include "stdlib/math/base/special/hacovercos.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_hacovercos( x[ i ] );
        printf( "hacovercos(%lf) = %lf\n", x[ i ], y );
    }
}

See Also

• @stdlib/math-base/special/hacoversin: compute the half-value coversed sine.
• @stdlib/math-base/special/havercos: compute the half-value versed cosine.

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.