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<p>&nbsp;<p>
<hr noshade size="5">
<h2><a name="ArcTan"></a>
ArcTan
</h2>

Returns the inverse tangens of a number.

<p><p>

<h3>
Syntax:
</h3>
<pre>y := ArcTan(x);</pre>

<p>

<table>
<tr>
<td>complex</td>
<td><pre>  y  </pre></td>
<td></td>
</tr>
<tr>
<td>complex</td>
<td><pre>  x  </pre></td>
<td></td>
</tr>
</table>

<p>


See also:&nbsp;&nbsp;<a href="kashref.html#Sin">Sin</a>, <a href="kashref.html#Cos">Cos</a>, <a href="kashref.html#Tan">Tan</a>

<p>

<h3>
Description:
</h3>
Given an <tt> x</tt> the function returns the inverse tangens (arctan) of
<tt> x</tt>. The computation is done in the current precision of
the real field.

<p><p>

<p>
<hr>
<p>
<h3>
Example:
</h3>

<pre>

kash> ArcTan(.5);
> 0.4636476090008061162142562314612144020285370542861202

</pre>

<p>


<hr>

<p>
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