Question

Formula for finding unit vector perpendicular or paralle to a given vector

Answer 1

First, find a vector ai+bj+ck that is perpendicular to 8i+4j−6k. (Set the dot product of the two equal to 0 and solve. You can actually set a and b equal to 1 here, and solve for c.) Then divide that vector by its length to make it a unit vector.