[FoRK] Succinct Trig

Russell Turpin < deafbox at hotmail.com > on > Tue Jul 4 19:57:03 PDT 2006

"Stephen D. Williams" <sdw at lig.net>:
>This is the most concise explanation I've ever seen.  I had trig 25 years 
>ago. (!  What the??)

Damn, that makes me feel old. I'm puzzled by the comment:

"'Normal' was used in the Wright's day much the same way
we use 'perpendicular' today."

Still is. Or to be more specific, "normal" is a topological
generalization of "perpendicular." Normal vectors have a
cross-product of zero.

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