Question

how can you tell if two vectors are parallel or orthogonal?

Answer 1

ortogonal when vector u (dot product) vector v=0
i don't remember when to tell they are parallel

Answer 2

maybe the dipank guy does

Answer 3

find the dot product if it is zero then perpendicular. if croos product is 0 then parallel

Answer 4

ok cool

Answer 5

because a X b=ab sin theta.
if theta 0 then croos prod. is zero