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Vector Proof : Dot-products and Cross-Products

Show that (A x B).(C x D) = (A.C)(B.D) - (A.D)(B.C)
Show that [A x (B x C)].B = (A x B).(A x B)

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A vector proof is provided. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

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