17 Apr
2015
17 Apr
'15
6:46 a.m.
Is there a Greek-style geometric proof that interprets the nth partial product (after some minor adjustments perhaps) as the perimeter of a regular 2^n-gon inscribed in the unit circle? Jim Propp On Thursday, April 16, 2015, David Wilson <davidwwilson@comcast.net> wrote:
x*cos(x/2)*cos(x/4)*cos(x/8)*. = sin(x).
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