On Mon, 2006-09-18 at 19:31 +0200, Iñaki Murillo Arcos wrote:
> Hello,
>
>  I don't know if the result of
>
>  acos(0.5) == pi/3
>
> is a bug or not. It looks strange to me.
>
>   Inaki Murillo

Seems reasonable to me:

> acos(0.5) == pi/3
[1] FALSE

> print(acos(0.5), 20)
[1] 1.0471975511965978534

> print(pi/3, 20)
[1] 1.0471975511965976313


See R FAQ 7.31 Why doesn't R think these numbers are equal?

HTH,

Marc Schwartz

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