if u and v are orthogonal, than u,v =(0,0,0) b. u x v is a scalar c. v.v = ||v|| d. if π/3 is the angle between u and v, than u.v, than u.v =1/2 ||u|| ||v|| 2. The parametric equation of the line in R3 that passes through the point P(2,1,9) and !(

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