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+---
+title: Math.atan2()
+slug: Web/JavaScript/Reference/Global_Objects/Math/atan2
+translation_of: Web/JavaScript/Reference/Global_Objects/Math/atan2
+---
+<div>{{JSRef}}</div>
+
+<p>A função <strong><code>Math.atan2()</code></strong> retorna o arco tangente do coeficiente dos argumentos passado.</p>
+
+<h2 id="Sintaxe">Sintaxe</h2>
+
+<pre class="syntaxbox"><code>Math.atan2(<var>y</var>, <var>x</var>)</code></pre>
+
+<h3 id="Parâmentros">Parâmentros</h3>
+
+<dl>
+ <dt><code>y</code></dt>
+ <dd>Primeiro numero.</dd>
+ <dt><code>x</code></dt>
+ <dd>Segundo numero.</dd>
+</dl>
+
+<h3 id="Retorno">Retorno</h3>
+
+<p>O arco tagente do coegiente dos parâmetros</p>
+
+<h2 id="Descrição">Descrição</h2>
+
+<p>O <code>Math.atan2()</code> método retorna um valor numérico entre -π e π representando o ângulo teta entre (x, y).  Assim indo no sentido anti-horario ao ângulo, medido em radianos, entre o eixo X positivo, e o ponto<code>(x, y)</code>.Nota os argumentos para essa função: primeiro o eixo Y(ordenadas) e o eixo X(absissas) como segundo parâmetro.</p>
+
+<p><img alt="A simple diagram showing the angle returned by atan2(y, x)" src="https://mdn.mozillademos.org/files/11557/atan2.png" style="height: 300px; width: 300px;"></p>
+
+<p><code>Math.atan2()os argumentos são passados separados x e y enquanto no Math.atan() é passado a razão entre esses argumentos.</code></p>
+
+<p>Porque <code>atan2()</code> é um método estático de  <code>Math</code>, você sempre usará  <code>Math.atan2()</code>, ao inves de um objeto Math criado (<code>Math</code> não é um construtor).</p>
+
+<h2 id="Examples">Examples</h2>
+
+<h3 id="Using_Math.atan2()">Using <code>Math.atan2()</code></h3>
+
+<pre class="brush: js">Math.atan2(90, 15); // 1.4056476493802699
+Math.atan2(15, 90); // 0.16514867741462683
+
+Math.atan2(±0, -0);               // ±PI.
+Math.atan2(±0, +0);               // ±0.
+Math.atan2(±0, -x);               // ±PI for x &gt; 0.
+Math.atan2(±0, x);                // ±0 for x &gt; 0.
+Math.atan2(-y, ±0);               // -PI/2 for y &gt; 0.
+Math.atan2(y, ±0);                // PI/2 for y &gt; 0.
+Math.atan2(±y, -Infinity);        // ±PI for finite y &gt; 0.
+Math.atan2(±y, +Infinity);        // ±0 for finite y &gt; 0.
+Math.atan2(±Infinity, x);         // ±PI/2 for finite x.
+Math.atan2(±Infinity, -Infinity); // ±3*PI/4.
+Math.atan2(±Infinity, +Infinity); // ±PI/4.
+</pre>
+
+<h2 id="Specifications">Specifications</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('ES1')}}</td>
+   <td>{{Spec2('ES1')}}</td>
+   <td>Initial definition. Implemented in JavaScript 1.0.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES5.1', '#sec-15.8.2.5', 'Math.atan2')}}</td>
+   <td>{{Spec2('ES5.1')}}</td>
+   <td> </td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-math.atan2', 'Math.atan2')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td> </td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-math.atan2', 'Math.atan2')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<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>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<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>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="Veja_também">Veja também</h2>
+
+<ul>
+ <li>{{jsxref("Math.acos()")}}</li>
+ <li>{{jsxref("Math.asin()")}}</li>
+ <li>{{jsxref("Math.atan()")}}</li>
+ <li>{{jsxref("Math.cos()")}}</li>
+ <li>{{jsxref("Math.sin()")}}</li>
+ <li>{{jsxref("Math.tan()")}}</li>
+</ul>