Math.acosh()
The Math.acosh()
function returns the hyperbolic
arc-cosine of a number, that is
Syntax
Math.acosh(x)
Parameters
x
-
A number.
Return value
The hyperbolic arc-cosine of the given number. If the number is less than
1, NaN
.
Description
Because acosh()
is a static method of Math
, you always use it
as Math.acosh()
, rather than as a method of a Math
object you
created (Math
is no constructor).
Examples
Using Math.acosh()
Math.acosh(-1); // NaN
Math.acosh(0); // NaN
Math.acosh(0.5); // NaN
Math.acosh(1); // 0
Math.acosh(2); // 1.3169578969248166
For values less than 1 Math.acosh()
returns NaN
.
Polyfill
For all , we have and so this can be emulated with the following function:
Math.acosh = Math.acosh || function(x) {
return Math.log(x + Math.sqrt(x * x - 1));
};
Specifications
Specification |
---|
ECMAScript Language Specification # sec-math.acosh |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
acosh | ChromeFull support38 | EdgeFull support12 | FirefoxFull support25 | Internet ExplorerNo supportNo | OperaFull support25 | SafariFull support8 | WebView AndroidFull support38 | Chrome AndroidFull support38 | Firefox for AndroidFull support25 | Opera AndroidFull support25 | Safari on iOSFull support8 | Samsung InternetFull support3.0 | DenoFull support1.0 | Node.jsFull support0.12.0 |
Legend
- Full support
- Full support
- No support
- No support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.