Oct 26, 2024

[Disclaimer: I am not a member so I could only read the first few paragraphs of this piece. Apologies in advance if I am discussing something already covered by it. AT]

Assume radius=1, then

2*cos=sin+1; 2*c*(1-s)=1-s*s=c*c;

2(1-s)=c; 4(1-s)=s+1; 3=5s; s=3/5;

8/5<>2*pi/4? 32>31.4159...

PS: Isn't this the diagram Leonardo da Vinci used as "measure of the man"?