Trig Series

I googled it: how does a calculator find sin and cos values.
Turns out they use the series formulae, below. Interesting
how each pursues a different strategy: the sine removes from
the arc measure created by the angle; the cosine removes
from the unit vector radius.

Animation: Die Kosinusfunktion um die Entwicklungsstelle 0 entwickelt, in sukzessiver Näherung

                                     C.lingg
source:Wikipedia