@stdlib/math-base-special-ahavercos
v0.2.3
Published
Compute the inverse half-value versed cosine.
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Archavercosine
Compute the inverse half-value versed cosine.
The inverse half-value versed cosine is defined as
Installation
npm install @stdlib/math-base-special-ahavercos
Usage
var ahavercos = require( '@stdlib/math-base-special-ahavercos' );
ahavercos( x )
Computes the inverse half-value versed cosine.
var v = ahavercos( 0.0 );
// returns ~3.1416
v = ahavercos( 1.0 );
// returns 0.0
v = ahavercos( 0.5 );
// returns ~1.5708
If x < 0
, x > 1
, or x
is NaN
, the function returns NaN
.
var v = ahavercos( 1.5 );
// returns NaN
v = ahavercos( -3.14 );
// returns NaN
v = ahavercos( NaN );
// returns NaN
Examples
var linspace = require( '@stdlib/array-base-linspace' );
var ahavercos = require( '@stdlib/math-base-special-ahavercos' );
var x = linspace( 0.0, 1.0, 100 );
var i;
for ( i = 0; i < x.length; i++ ) {
console.log( ahavercos( x[ i ] ) );
}
C APIs
Usage
#include "stdlib/math/base/special/ahavercos.h"
stdlib_base_ahavercos( x )
Compute the inverse half-value versed cosine of a double-precision floating-point number (in radians).
double out = stdlib_base_ahavercos( 0.0 );
// returns ~3.1416
If x < 0
, x > 1
, or x
is NaN
, the function returns NaN
.
double out = stdlib_base_ahavercos( -3.14 );
// returns NaN
The function accepts the following arguments:
- x:
[in] double
input value.
double stdlib_base_ahavercos( const double x );
Examples
#include "stdlib/math/base/special/ahavercos.h"
#include <stdio.h>
int main( void ) {
const double x[] = { -2.0, -1.6, -1.2, -0.8, -0.4, 0.4, 0.8, 1.2, 1.6, 2.0 };
double v;
int i;
for ( i = 0; i < 10; i++ ) {
v = stdlib_base_ahavercos( x[ i ] );
printf( "ahavercos(%lf) = %lf\n", x[ i ], v );
}
}
See Also
@stdlib/math-base/special/ahaversin
: compute the inverse half-value versed sine.@stdlib/math-base/special/havercos
: compute the half-value versed cosine.@stdlib/math-base/special/vercos
: compute the 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.