---
layout: page
title: "JavaScript acosh function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/acosh:302
- /functions/view/acosh
- /functions/view/302
- /functions/acosh:302
- /functions/302
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's acosh

{% codeblock math/acosh.js lang:js https://raw.github.com/kvz/phpjs/master/functions/math/acosh.js raw on github %}
function acosh (arg) {
  // From: http://phpjs.org/functions
  // +   original by: Onno Marsman
  // *     example 1: acosh(8723321.4);
  // *     returns 1: 16.674657798418625
  return Math.log(arg + Math.sqrt(arg * arg - 1));
}
{% endcodeblock %}

 - [Raw function on GitHub](https://github.com/kvz/phpjs/blob/master/functions/math/acosh.js)

Please note that php.js uses JavaScript objects as substitutes for PHP arrays, they are 
the closest match to this hashtable-like data structure. 

Please also note that php.js offers community built functions and goes by the 
[McDonald's Theory](https://medium.com/what-i-learned-building/9216e1c9da7d). We'll put online 
functions that are far from perfect, in the hopes to spark better contributions. 
Do you have one? Then please just: 

 - [Edit on GitHub](https://github.com/kvz/phpjs/edit/master/functions/math/acosh.js)

### Example 1
This code
{% codeblock lang:js example %}
acosh(8723321.4);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
16.674657798418625
{% endcodeblock %}


### Other PHP functions in the math extension
{% render_partial _includes/custom/math.html %}