From bug-octave-request at bevo dot che dot wisc dot edu Sat Jan 10 16:15:57 2004
Subject: acot computation
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: =?iso-8859-1?Q?Gr=E9gory_Vanuxem?= <g dot vanuxem at wanadoo dot fr>
Cc: <bug-octave at bevo dot che dot wisc dot edu>
Date: Sat, 10 Jan 2004 16:15:30 -0600

On 10-Jan-2004, Grégory Vanuxem <g dot vanuxem at wanadoo dot fr> wrote:

| 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)

Thanks, I made this change.

jwe



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