Asked by Alex
                how to determine vectors u and v are parallel, orthogonal, or neither?
            
            
        Answers
                    Answered by
            Damon
            
    If you know dot and cross products
if parallel, |A cross B| = |A| |B| sin theta
if parallel theta and sin theta = 0 and cross product is 0
if perpendicular then dot product = |A| |B| cos theta = 0
    
if parallel, |A cross B| = |A| |B| sin theta
if parallel theta and sin theta = 0 and cross product is 0
if perpendicular then dot product = |A| |B| cos theta = 0
                    Answered by
            Damon
            
    If you are not there yet
then
do y = m x + b for both
if the two m s are the same, same slope, parallel
if m for second = -1/m for first, then perpendicular
    
then
do y = m x + b for both
if the two m s are the same, same slope, parallel
if m for second = -1/m for first, then perpendicular
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