In article <i92dvd$ad...@news.eternal-september.org>, "BartC" <b...@freeuk.com> wrote:
> "Thomas A. Russ" <t...@sevak.isi.edu> wrote in message > news:ymi1v7vgyp8....@blackcat.isi.edu... > > torb...@diku.dk (Torben ZÆgidius Mogensen) writes: > > > >> Trigonometric functions do take arguments of particular units: radians > >> or (less often) degrees, with conversion needed if you use the "wrong" > >> unit. > > > > But radians are dimensionless. > > But they are still units No, they aren't. > so that you can choose to use radians, degrees or gradians Those aren't units either, any more than a percentage is a unit. They are just different ways of writing numbers. All of the following are the same number written in different notations: 0.5 1/2 50% Likewise, all of the following are the same number written in different notations: pi/2 pi/2 radians 90 degrees 100 gradians 1/4 circle 0.25 circle 25% of a circle 25% of 2pi See? rg -- http://mail.python.org/mailman/listinfo/python-list
