---
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>