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Subject: Re: [office-formula] constraint of ACOT

Is the objection over the reference to PI() rather than directly using the 
Greek letter Pi?

Or is the choice of convention the problem?

According to http://mathworld.wolfram.com/InverseCotangent.html there are 
two conventions: (0,Pi) or (-Pi/2, Pi/2).  The former is continuous, while 
that later has a discontinuity at 0.


"Andreas J. Guelzow" <aguelzow@math.concordia.ab.ca> wrote on 01/06/2010 
11:15:44 AM:

> ACOT has the constraint "The result must be between 0 and PI()." This
> doe snot look like a valid constraint to me. 
> ANdreas
> -- 
> Andreas J. Guelzow, PhD, FTICA
> Mathematical & Computing Sciences
> Concordia University College of Alberta

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