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<A NAME=ACOTH>

<TITLE>ACOTH</TITLE></A>
<b><a href=r37_idx.html>INDEX</a></b><p><p>



<B>ACOTH</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
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<em>acoth</em>represents the inverse hyperbolic cotangent of its argument. 
It takes an arbitrary scalar expression as its argument. The derivative 
of <em>acoth</em> is known to the system. Numerical values may also be found 
by turning on the switch 
<A HREF=r37_0330.html>rounded</A>. 
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syntax: </H3>
<em>acoth</em>(&lt;expression&gt;) or <em>acoth</em> &lt;simple\_expression&gt; 

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&lt;expression&gt; may be any scalar REDUCE expression, not an array, 
matrix or vector expression. &lt;simple\_expression&gt; must be a single 
identifier or begin with a prefix operator name. You can add 
functionality yourself with <em>let</em> and procedures. 
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