Talk:Equivalence of Definitions of Sine and Cosine

Has this proved what it was purported to? All it has done is demonstrate that the functions satisfying the properties they have are unique. The idea of this page was to show that the geometrically-defined entities and the algebraically-defined ones are the same thing. If that follows from this, we have more work to do to demonstrate it. --prime mover (talk) 06:09, 7 December 2012 (UTC)