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<html><head><title>XLISP tan</title>
<link rel="stylesheet" type="text/css" href="reference.css">
</head>
<body>
<a href="../start.htm">Nyquist / XLISP 2.0</a> -
<a href="../manual/contents.htm">Contents</a> |
<a href="../tutorials/tutorials.htm">Tutorials</a> |
<a href="../examples/examples.htm">Examples</a> |
<a href="reference-index.htm">Reference</a>
<hr>
<h1>tan</h1>
<hr>
<p><table cellpadding="0" cellspacing="0" style="margin-left:10px"><tbody>
<tr valign="top">
<td><nobr>Type:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>function (subr)</nobr></td>
</tr>
<tr valign="top">
<td><nobr>Source:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>xlmath.c</nobr></td>
</tr>
</tbody></table></p>
<h2>Syntax</h2>
<dl>
<dt>(tan <i>expr</i>)</dt>
<dd><i>expr</i> - floating point number or expression<br>
returns - the tangent of the number</dd>
</dl>
<h2>Description</h2>
<p>The 'tan' function calculates the tangent of the 'expr' and returns the
result. The 'expr' is in radians.</p>
<h2>Examples</h2>
<pre class="example">
(tan 0.0) <font color="#008844">; returns 0</font>
(tan 1.0) <font color="#008844">; returns 1.55741</font>
(tan (/ 3.14159 2)) <font color="#008844">; returns 753696</font>
(tan 2.0) <font color="#008844">; returns -2.18504</font>
(tan 3.0) <font color="#008844">; returns -0.142547</font>
(tan 3.14159) <font color="#008844">; returns -2.65359e-06</font>
(tan 4.5) <font color="#008844">; returns 4.63733</font>
</pre>
<p><b>Common Lisp:</b> Common Lisp allows for integer numbers, which
XLISP does not support for 'tan'.</p>
<p>See the
<a href="../manual/xlisp-man-023.htm#tan">tan</a>
function in the <nobr>XLISP 2.0</nobr> manual.</p>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
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