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You need to know that the cross product of two vectors is a vector perpendicular to both vectors. It is defined only in 3 space.

The formula to find the cross product of vector a (vector a=[a1,a2,a3]) and vector b (vector b=[b1,b2,b3]) is:

vector a x vector b = [a2b3-a3b2,a3b1-a1b3,a1b2-a2b1]

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Q: How do you do cross products?
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