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---
title: Math.sinh()
slug: Web/JavaScript/Reference/Global_Objects/Math/sinh
translation_of: Web/JavaScript/Reference/Global_Objects/Math/sinh
---
<div>{{JSRef("Global_Objects", "Math")}}</div>
<h2 id="Summary">概述</h2>
<p> <code><strong>Math.sinh()</strong></code> 函数返回一个数字(单位为角度)的双曲正弦值.</p>
<h2 id="Syntax">语法</h2>
<pre class="syntaxbox">Math.sinh(<em>x</em>)</pre>
<h3 id="Parameters">参数</h3>
<dl>
<dt><code>x</code></dt>
<dd>任意数字 (单位为度).</dd>
</dl>
<h2 id="Description">描述</h2>
<p>双曲正弦的图像如下:</p>
<p><img alt="" src="http://upload.wikimedia.org/wikipedia/commons/1/17/Sinh.png" style="height: 300px; width: 300px;"></p>
<h2 id="Examples">示例</h2>
<pre class="brush:js">Math.sinh(0) // 0
Math.sinh(1) // 1.1752011936438014
Math.sinh("-1") // -1.1752011936438014
Math.sinh("foo") // NaN
</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('ES6', '#sec-math.sinh', 'Math.sinh')}}</td>
<td>{{Spec2('ES6')}}</td>
<td>Initial defintion</td>
</tr>
</tbody>
</table>
<h2 id="Polyfill">Polyfill</h2>
<p>该函数可以使用 {{jsxref("Math.exp()")}}<code> 函数来实现</code>:</p>
<pre class="brush: js language-js">function sinh(x){
return (Math.exp(x) - Math.exp(-x)) / 2;
}</pre>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p>{{ CompatibilityTable() }}</p>
<div>
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatNo}}</td>
<td>{{CompatGeckoDesktop("25")}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<div>
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Chrome for Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatGeckoMobile("25")}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<h2 id="See_also">相关链接</h2>
<ul>
<li>{{jsxref("Math.acos()")}}</li>
<li>{{jsxref("Math.asin()")}}</li>
<li>{{jsxref("Math.atan()")}}</li>
<li>{{jsxref("Math.atan2()")}}</li>
<li>{{jsxref("Math.cos()")}}</li>
<li>{{jsxref("Math.tan()")}}</li>
</ul>
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