@stdlib/math-base-special-fast-acosh

acosh

Compute the hyperbolic arccosine of a number.

Installation

npm install @stdlib/math-base-special-fast-acosh

Usage

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

acosh( x )

Computes the hyperbolic arccosine of a number (in radians).

var v = acosh( 1.0 );
// returns 0.0

v = acosh( 2.0 );
// returns ~1.317

v = acosh( 0.5 );
// returns NaN

The domain of x is restricted to [1,+infinity). If x < 1, the function will return NaN.

var v = acosh( 0.0 );
// returns NaN

Notes

• For large x, the function will overflow.

  var v = acosh( 1.0e308 );
  // returns Infinity
  // (expected 709.889355822726)

Examples

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

var x = linspace( 1.0, 5.0, 103 );

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

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See Also

• @stdlib/math/base/special/acosh: compute the hyperbolic arccosine of a number.

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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 © 2016-2022. The Stdlib Authors.