# @stdlib/math-base-special-acoversin

0.1.1 • Public • Published

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# Arccoversine

Compute the inverse coversed sine.

The inverse coversed sine is defined as

## Installation

`npm install @stdlib/math-base-special-acoversin`

## Usage

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

#### acoversin( x )

Computes the inverse coversed sine.

```var v = acoversin( 0.0 );
// returns ~1.5708

v = acoversin( 3.141592653589793/2.0 );
// returns ~-0.6075

v = acoversin( 3.141592653589793/6.0 );
// returns ~0.4966```

If `x < 0`, `x > 2`, or `x` is `NaN`, the function returns `NaN`.

```var v = acoversin( -1.0 );
// returns NaN

v = acoversin( 3.14 );
// returns NaN

v = acoversin( NaN );
// returns NaN```

## Examples

```var linspace = require( '@stdlib/array-base-linspace' );
var acoversin = require( '@stdlib/math-base-special-acoversin' );

var x = linspace( 0.0, 2.0, 100 );

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

## 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.

## Package Sidebar

### Install

`npm i @stdlib/math-base-special-acoversin`

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