Question

Find the unit vector perpendicular to A =3i +2j - k and B= i - J + k

Answer 1

first take the cross product 
A*B = C = 3i-4j-5k
to get the unit vector divide C by its modulus
c = C/sqrt(50)

Answer 2

The ans is -2i/22 -3j/22 -3k/22 is the unit vector perpendicular to A and B vectors
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