aboutsummaryrefslogtreecommitdiff
path: root/files/it/web/javascript/reference/global_objects/math/atan2
diff options
context:
space:
mode:
authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:42:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:42:17 -0500
commitda78a9e329e272dedb2400b79a3bdeebff387d47 (patch)
treee6ef8aa7c43556f55ddfe031a01cf0a8fa271bfe /files/it/web/javascript/reference/global_objects/math/atan2
parent1109132f09d75da9a28b649c7677bb6ce07c40c0 (diff)
downloadtranslated-content-da78a9e329e272dedb2400b79a3bdeebff387d47.tar.gz
translated-content-da78a9e329e272dedb2400b79a3bdeebff387d47.tar.bz2
translated-content-da78a9e329e272dedb2400b79a3bdeebff387d47.zip
initial commit
Diffstat (limited to 'files/it/web/javascript/reference/global_objects/math/atan2')
-rw-r--r--files/it/web/javascript/reference/global_objects/math/atan2/index.html155
1 files changed, 155 insertions, 0 deletions
diff --git a/files/it/web/javascript/reference/global_objects/math/atan2/index.html b/files/it/web/javascript/reference/global_objects/math/atan2/index.html
new file mode 100644
index 0000000000..842106f7a1
--- /dev/null
+++ b/files/it/web/javascript/reference/global_objects/math/atan2/index.html
@@ -0,0 +1,155 @@
+---
+title: Math.atan2()
+slug: Web/JavaScript/Reference/Global_Objects/Math/atan2
+tags:
+ - Arcotangente
+ - JavaScript
+ - Math
+ - metodo
+translation_of: Web/JavaScript/Reference/Global_Objects/Math/atan2
+---
+<div>{{JSRef}}</div>
+
+<p>La funzione <strong><code>Math.atan2() </code></strong>restituisce l'arcotangente del quoziente dei suoi argomenti.</p>
+
+<h2 id="Sintassi">Sintassi</h2>
+
+<pre class="syntaxbox"><code>Math.atan2(<var>y</var>, <var>x</var>)</code></pre>
+
+<h3 id="Parametri">Parametri</h3>
+
+<dl>
+ <dt><code>y</code></dt>
+ <dd>Primo numero.</dd>
+ <dt><code>x</code></dt>
+ <dd>Secondo numero.</dd>
+</dl>
+
+<h3 id="Valore_restituito">Valore restituito</h3>
+
+<p>L'arcotangente del quoziente degli argomenti forniti alla funzione, espresso in radianti e compreso tra -π e π.</p>
+
+<h2 id="Descrizione">Descrizione</h2>
+
+<p>Il metodo <code>Math.atan2()</code> restituisce un valore compreso tra -π e π che reppresenta l'angolo teta di un punto <code>(x, y)</code>. Questo angolo è orientato in senso antiorario, misurato in radianti e compreso tra l'asse positivo delle ascisse, ed il punto <code>(x, y)</code>. È importante ricordare che il primo argomento da fornire alla funzione è l'ordinata del punto ed il secondo la sua ascissa.</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>A Math.atan2()</code> vengono passate x ed y separatamente, mentre a <code>Math.atan()</code> deve essere passato il loro quoziente.</p>
+
+<p>Poichè <code>atan2()</code> è un metodo statico di <code>Math </code>esso viene sempre utilizzato nella forma <code>Math.atan2()</code>, invece che come metodo di un oggetto <code>Math </code>che hai personalmente creato (<code>Math</code> non è un costruttore).</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 con x &gt; 0.
+Math.atan2(±0, x); // ±0 con x &gt; 0.
+Math.atan2(-y, ±0); // -PI/2 con y &gt; 0.
+Math.atan2(y, ±0); // PI/2 con y &gt; 0.
+Math.atan2(±y, -Infinity); // ±PI con y finito e y &gt; 0.
+Math.atan2(±y, +Infinity); // ±0 con y finito e y &gt; 0.
+Math.atan2(±Infinity, x); // ±PI/2 con x finito.
+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="See_also">See also</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>