Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

[zh-TW]: create Math.acosh() #25121

Merged
merged 4 commits into from
Dec 19, 2024
Merged
Changes from 3 commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Original file line number Diff line number Diff line change
@@ -0,0 +1,63 @@
---
title: Math.acosh()
slug: Web/JavaScript/Reference/Global_Objects/Math/acosh
l10n:
sourceCommit: 761b9047d78876cbd153be811efb1aa77b419877
---

{{JSRef}}

**`Math.acosh()`** 靜態方法回傳數字的反雙曲餘弦值。也就是說,

<math display="block">
<semantics><mtable columnalign="right left right left right left right left right left" columnspacing="0em" displaystyle="true"><mtr><mtd><mo>∀</mo><mi>x</mi><mo>≥</mo><mn>1</mn><mo>,</mo><mspace width="0.2777777777777778em"></mspace><mrow><mo lspace="0em" rspace="0.16666666666666666em">𝙼𝚊𝚝𝚑.𝚊𝚌𝚘𝚜𝚑</mo><mo stretchy="false">(</mo><mi>𝚡</mi><mo stretchy="false">)</mo></mrow></mtd><mtd><mo>=</mo><mo lspace="0em" rspace="0.16666666666666666em">arcosh</mo><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mtext>the unique&nbsp;</mtext><mi>y</mi><mo>≥</mo><mn>0</mn><mtext>&nbsp;such that&nbsp;</mtext><mo lspace="0em" rspace="0em">cosh</mo><mo stretchy="false">(</mo><mi>y</mi><mo stretchy="false">)</mo><mo>=</mo><mi>x</mi></mtd></mtr><mtr><mtd></mtd><mtd><mo>=</mo><mo lspace="0em" rspace="0em">ln</mo><mrow><mo>(</mo><mrow><mi>x</mi><mo>+</mo><msqrt><mrow><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mn>1</mn></mrow></msqrt></mrow><mo>)</mo></mrow></mtd></mtr></mtable><annotation encoding="TeX">\begin{aligned}\forall x \geq 1,\;\mathtt{\operatorname{Math.acosh}(x)} &= \operatorname{arcosh}(x) = \text{the unique } y \geq 0 \text{ such that } \cosh(y) = x\\&= \ln\left(x + \sqrt{x^2 - 1}\right)\end{aligned}</annotation></semantics>
</math>

{{EmbedInteractiveExample("pages/js/math-acosh.html")}}

## 語法

```js-nolint
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 {{jsxref("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

{{Specifications}}

## 瀏覽器相容性

{{Compat}}

## 參見

- [在 `core-js` 中的 `Math.acosh` polyfill](https://github.com/zloirock/core-js#ecmascript-math)
Dr-XYZ marked this conversation as resolved.
Show resolved Hide resolved
- {{jsxref("Math.asinh()")}}
- {{jsxref("Math.atanh()")}}
- {{jsxref("Math.cosh()")}}
- {{jsxref("Math.sinh()")}}
- {{jsxref("Math.tanh()")}}
Loading