Re: New approach to annex D of the 754-R proposal.

[Nick Maclaren <nmm1@xxxxxxxxxxxxx>]

Peter Henderson <petercbh@xxxxxxxxxxx> wrote:
> I apologise, but I can't resist.  tanPi(-1/2) must equal -infty, 
> tanPi(+1/2) must equal +infty and cotPi(1) must equal -infty.  This is 
> because nobody would accept anything other than atanPi(tanPi(x)) = x for 
> x in [-1/2, +1/2] and tanPi(atanPi(x)) = x in [-infty, +infty], 

That is false.

I am one of many people who would much prefer a NaN for that, which
disproves your claim of "nobody".


Regards,
Nick Maclaren,
University of Cambridge Computing Service,
New Museums Site, Pembroke Street, Cambridge CB2 3QH, England.
Email:  nmm1@xxxxxxxxx
Tel.:  +44 1223 334761    Fax:  +44 1223 334679