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<a href="../../../html/index.html">Home</a> » <a href="../../../html/ops.html">Opcodes</a> » Obscure Mathematical Opcodes
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<h1><a name="NAME"
>NAME</a></h1>
<p>obscure.ops - Obscure Mathematical Opcodes</p>
<h1><a name="DESCRIPTION"
>DESCRIPTION</a></h1>
<p>Parrot's library of obscure mathematical ops.
These turn common trig expressions into a single op.</p>
<p>To use this library of ops,
add this directive to your PIR:</p>
<pre> .loadlib 'obscure_ops'</pre>
<h2><a name="Obscure_trigonometric_operations"
>Obscure trigonometric operations</a></h2>
<p>Reference:</p>
<pre> Abramowitz, M. and Stegum, C. A. (Eds.). Handbook of Mathematical
Functions with Formulas, Graphs, and Mathematical Tables, 9th printing.
New York: Dover, p. 78, 1972.</pre>
<dl>
<dt><a name="covers(out_NUM,_in_NUM)"
><b>covers</b>(out NUM, in NUM)</a></dt>
Set $1 to the coversine (in radians) of $2.
<dt><a name="exsec(out_NUM,_in_NUM)"
><b>exsec</b>(out NUM, in NUM)</a></dt>
Set $1 to the exsecant of $2 (given in radians).
<dt><a name="hav(out_NUM,_in_NUM)"
><b>hav</b>(out NUM, in NUM)</a></dt>
Set $1 to the haversine (in radians) of $2.
<dt><a name="vers(out_NUM,_in_NUM)"
><b>vers</b>(out NUM, in NUM)</a></dt>
Set $1 to the versine (in radians) of $2.
<dt><a name="gcd(out_INT,_in_INT,_in_INT)"
><b>gcd</b>(out INT, in INT, in INT)</a></dt>
Greatest Common divisor of $2 and $3.
<dt><a name="lcm(out_INT,_in_INT,_in_INT)"
><b>lcm</b>(out INT, in INT, in INT)</a></dt>
Least Common Multiple of $2 and $3
<dt><a name="fact(out_INT,_in_INT)"
><b>fact</b>(out INT, in INT)</a></dt>
<dt><a name="fact(out_NUM,_in_INT)"
><b>fact</b>(out NUM, in INT)</a></dt>
Factorial, n!. Calculates the product of 1 to N.</dl>
<h1><a name="COPYRIGHT"
>COPYRIGHT</a></h1>
<p>Copyright (C) 2001-2009, Parrot Foundation.</p>
<h1><a name="LICENSE"
>LICENSE</a></h1>
<p>This program is free software. It is subject to the same license as the Parrot interpreter itself.</p>
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