Geometrically the dot product is defined to be |x| |y| cosθ where |x| |y| are the magnitudes of the two vectors in question. Can anyone prove, beginning with this geometrical definition, an equivalence between it and the algebraic definition of the dot product?
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1Wikipedia can http://en.wikipedia.org/wiki/Dot_product – AnalysisStudent0414 May 05 '14 at 22:17
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Great, exactly what I was looking for. – King Squirrel May 06 '14 at 00:52