The Math.acosh()
function returns the hyperbolic arc-cosine of a number, that is
The Math.acosh()
function returns the hyperbolic arc-cosine of a number, that is
Math.acosh(x)
x
A number.
The hyperbolic arc-cosine of the given number. If the number is less than 1, NaN
.
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).
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
.
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)); };
Specification |
---|
ECMAScript Language Specification # sec-math.acosh |
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
acosh |
38
|
12
|
25
|
No
|
25
|
8
|
38
|
38
|
25
|
25
|
8
|
3.0
|
1.0
|
0.12.0
|
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/acosh