subexpressions (OT: math)

[Stebanoid at gmail.com]

On 3    , 14:05, Steven D'Aprano <s... at REMOVE.THIS.cybersource.com.au>
wrote:
> On Sun, 03 Jun 2007 09:02:11 +0200, Leonhard Vogt wrote:
> >> bla-bla
>
> Hmmm... perhaps that's why the author of the "units" program doesn't
> treat angles as dimensionless when taking square roots.
>
> Given that, I withdraw my claim that the sqrt of an angle is just an
> angle. I can't quite see why it shouldn't be, but the evidence is fairly
> solid that it isn't.
>
> --
> Steven

angle is dimensionless unit.
To understand it: sin() can't have dimensioned argument. It is can't
to be - sin(meters)

it is difficult to invent what is a "sqrt from a angle" but it can be.