"Strong typing vs. strong testing"
rNOSPAMon at flownet.com
Wed Oct 13 02:41:01 CEST 2010
In article <i92dvd$ada$1 at news.eternal-september.org>,
"BartC" <bc at freeuk.com> wrote:
> "Thomas A. Russ" <tar at sevak.isi.edu> wrote in message
> news:ymi1v7vgyp8.fsf at blackcat.isi.edu...
> > torbenm at 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:
Likewise, all of the following are the same number written in different
25% of a circle
25% of 2pi
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