subexpressions (OT: math)

[Stebanoid at gmail.com]

On 3    , 22:07, "Steban... at gmail.com" <Steban... at gmail.com> wrote:
>
> angle is a ratio of two length and dimensionless.http://en.wikipedia.org/wiki/Angle#Units_of_measure_for_angles
>
> only dimensionless values can be a argument of a sine and exponent!
> Are you discordant?

if you are discordant read more :P :
sine is a dimensionless value.
if we expand sine in taylor series sin(x) = x - (x^3)/6 + (x^5)/120
etc.
you can see that sin can be dimensionless only if x is dimensionless
too.

I am a professional physicist and a know about what I talk