Math.acosh()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Math.acosh()
靜態方法回傳數字的反雙曲餘弦值。也就是說,
嘗試一下
console.log(Math.acosh(0.999999999999));
// Expected output: NaN
console.log(Math.acosh(1));
// Expected output: 0
console.log(Math.acosh(2));
// Expected output: 1.3169578969248166
console.log(Math.acosh(2.5));
// Expected output: 1.566799236972411
語法
js
Math.acosh(x)
參數
x
-
一個大於或等於 1 的數字。
回傳值
x
的反雙曲餘弦值。如果 x
小於 1,則回傳 NaN
。
描述
由於 acosh()
是 Math
的靜態方法,你必須使用 Math.acosh()
來呼叫它,而非呼叫你建立的 Math
物件的方法(Math
並非建構子)。
範例
使用 Math.acosh()
js
Math.acosh(0); // NaN
Math.acosh(1); // 0
Math.acosh(2); // 1.3169578969248166
Math.acosh(Infinity); // Infinity
規範
Specification |
---|
ECMAScript® 2025 Language Specification # sec-math.acosh |
瀏覽器相容性
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
acosh |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full 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.