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March 18th, 2011, 09:30 AM   #1
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Law of Cosines PWW

I wonder if anyone would comment on the value of this proof without words I have done on the Law of Cosines. It is independent of the Pythagorean Theorem. More on this proof is posted at CTK, though there it is in purely algebraic form:

http://www.cut-the-knot.org/pythagoras/cosine.shtml

http://www.cut-the-knot.org/pythagoras/ ... kach.shtml

[attachment=0:3jym45ln]Cosines PWW.pdf[/attachment:3jym45ln]
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