From bug-octave-request at bevo dot che dot wisc dot edu Sat Jan 10 08:56:38 2004
Subject: acot computation
From: =?iso-8859-1?Q?Gr=E9gory_Vanuxem?= <g dot vanuxem at wanadoo dot fr>
To: <bug-octave at bevo dot che dot wisc dot edu>
Date: Sat, 10 Jan 2004 15:56:00 +0100

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In acot.m (elfun), you use:

 pi/2 - atan (z);

Then ff argument is negative:

 acot(-1.3) = 2.4859

I think it's 0.6557
In other words, you should use:

	atan(1/z)


						Greg
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