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authort7yang <t7yang@gmail.com>2022-01-10 08:38:07 +0800
committerIrvin <irvinfly@gmail.com>2022-02-16 02:35:54 +0800
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parent12a899ab8540bc84f56a0dc6491be80a48499d49 (diff)
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index 482f2fa09a..d0741e46a4 100644
--- a/files/zh-cn/web/javascript/reference/global_objects/math/cos/index.html
+++ b/files/zh-cn/web/javascript/reference/global_objects/math/cos/index.html
@@ -5,22 +5,22 @@ translation_of: Web/JavaScript/Reference/Global_Objects/Math/cos
---
<div>
{{JSRef("Global_Objects", "Math")}}</div>
-<h2 id="Summary" name="Summary">概述</h2>
+<h2 id="Summary">概述</h2>
<p><code><strong>Math.cos()</strong></code> 函数返回一个数值的余弦值。</p>
-<h2 id="Syntax" name="Syntax">语法</h2>
+<h2 id="Syntax">语法</h2>
<pre class="syntaxbox">Math.cos(<em>x</em>)</pre>
-<h3 id="Parameters" name="Parameters">参数</h3>
+<h3 id="Parameters">参数</h3>
<dl>
<dt>
<code>x</code></dt>
<dd>
一个以弧度为单位的数值。</dd>
</dl>
-<h2 id="Description" name="Description">描述</h2>
+<h2 id="Description">描述</h2>
<p><code>cos</code> 方法返回一个 -1 到 1 之间的数值,表示角度(单位:弧度)的余弦值。</p>
<p>由于 <code>cos</code> 是 <code>Math</code> 的静态方法,所以应该像这样使用:<code>Math.cos()</code>,而不是作为你创建的 <code>Math</code> 实例的方法。</p>
-<h2 id="Examples" name="Examples">示例</h2>
-<h3 id="Example:_Using_Math.cos" name="Example:_Using_Math.cos">例子:使用 <code>Math.cos</code></h3>
+<h2 id="Examples">示例</h2>
+<h3 id="Example:_Using_Math.cos">例子:使用 <code>Math.cos</code></h3>
<pre class="brush:js">Math.cos(0); // 1
Math.cos(1); // 0.5403023058681398
@@ -100,7 +100,7 @@ Math.cos(2 * Math.PI); // 1
</tbody>
</table>
</div>
-<h2 id="See_also" name="See_also">相关链接</h2>
+<h2 id="See_also">相关链接</h2>
<ul>
<li>The {{jsxref("Global_Objects/Math", "Math")}} object it belongs to.</li>
</ul>