Proving Vector Properties: Dot Product and Cross Product

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In this video, we look at the process of writing a proof or finding a counterexample to a proposed identity regarding dot or cross product.
  1. Kenneth M. Monks
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Heads up: in the first example, illustrating the commutative property of dot product, I have a sign error, saying that -2 + 3 = -1 instead of positive 1, as it should have been. (In fact I did the exact same sign error on the LHS and RHS... talk about confirmation bias!) Thanks so much to Mia for finding this and pointing it out.

EccoMath