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

Returns the cosine of a number.

<p><p>

<h3>
Syntax:
</h3>
<pre>y := Cos(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#Tan">Tan</a>

<p>

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

<p><p>

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

<pre>

kash> Cos(.5);
0.877582561890372716116281582603829651991645197109744
kash> i := Comp(0, 1);
1*i
kash> Cos(i);
> 1.543080634815243778477905620757061682601529112366

</pre>

<p>


<hr>

<p>
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