Parallel Vectors - Learn How to Calculate

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BOAS
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Sorry - Answered my own question.
 
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To find a vector which is perpendicular to 2 others, just find the cross product between the two.

Let A(1,-1,2) and B(2,1,-3).

A x B will be perpendicular to both vectors A and B.
(I hope you know to find cross product)

To find unit vector just divide the resultant with the norm.