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For Any To Vectors ` Vec A And Vec B`, Prove That |vec A Xx Vec B|^2 = A^2 B^2 - ( Vec A. Vec B)^2`

2020 2:01
Synopsis
For any to vectors ` vec A and vec B`, prove that |vec A xx vec B|^2 = A^2 B^2 - ( vec A. vec B)^2`.

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