[net.micro] Pi Series

METH@usc-isi.arpa (12/24/85)

The simplest way to generate pi is to realize that
arctan(1)=pi/4.  Thus

pi=4*arctan(1)=4*(1 - 1/3 + 1/5 - 1/7 + ...)

-Sheldon Meth (METH@ISIA)
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