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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:42:52 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:42:52 -0500
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+---
+title: Math.cos()
+slug: Web/JavaScript/Reference/Global_Objects/Math/cos
+tags:
+ - Geometria
+ - JavaScript
+ - Matemática
+ - Math
+ - Trigonometría
+ - cos
+ - cosseno
+ - metodo
+translation_of: Web/JavaScript/Reference/Global_Objects/Math/cos
+---
+<div>{{JSRef}}</div>
+
+<p><span style="display: none;"> </span><span class="seoSummary">A função <strong><code>Math.cos()</code></strong> ,que é estatica, retorna o {{interwiki("wikipedia", "cosseno")}} de um ângulo, que deve estar em {{interwiki("wikipedia", "radianos")}}. A expressão é </span><math style="display: inline;"> <mstyle displaystyle="true"> <mfrac> <msub> <mrow> <mtext>length</mtext> </mrow> <mrow> <mrow> <mtext>adjacent</mtext> </mrow> </mrow> </msub> <msub> <mrow> <mtext>length</mtext> </mrow> <mrow> <mrow> <mtext>hypotenuse</mtext> </mrow> </mrow> </msub> </mfrac> </mstyle> </math>.<span style="display: none;"> </span></p>
+
+<div>{{EmbedInteractiveExample("pages/js/math-cos.html")}}</div>
+
+
+
+<h2 id="Sintaxe">Sintaxe</h2>
+
+<pre class="syntaxbox"><code>Math.cos(<var>x</var>)</code></pre>
+
+<h3 id="Parâmetros">Parâmetros</h3>
+
+<dl>
+ <dt><code>x</code></dt>
+ <dd>Ângulo em radianos</dd>
+</dl>
+
+<h3 id="Valor_de_retorno">Valor de retorno</h3>
+
+<p>O cosseno do número: x</p>
+
+<h2 id="Descrição">Descrição</h2>
+
+<p><code>Math.cos()</code> é um método que retorna um número entre -1 e 1, que representa o cosseno de um ângulo.</p>
+
+<p>Já que <code>cos()</code> é um método estático de <code>Math</code>, você sempre deve usar <code>Math.cos()</code>, ao invez de criar um objeto de <code>Math</code> (<code>Math</code> não tem construtor).</p>
+
+<h2 id="Exemplos">Exemplos</h2>
+
+<h3 id="Usando_Math.cos()">Usando <code>Math.cos()</code></h3>
+
+<pre class="brush: js">Math.cos(0); // 1
+Math.cos(1); // 0.5403023058681398
+
+Math.cos(Math.PI); // -1
+Math.cos(2 * Math.PI); // 1
+</pre>
+
+<h2 id="Especificações">Especificações</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Especificação</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comentário</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-15.8.2.7', 'Math.cos')}}</td>
+ <td>{{Spec2('ES5.1')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-math.cos', 'Math.cos')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-math.cos', 'Math.cos')}}</td>
+ <td>{{Spec2('ESDraft')}}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilidade_dos_Browsers">Compatibilidade dos Browsers</h2>
+
+<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("javascript.builtins.Math.cos")}}</p>
+
+<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.atan2()")}}</li>
+ <li>{{jsxref("Math.sin()")}}</li>
+ <li>{{jsxref("Math.tan()")}}</li>
+</ul>