Hi. I need help finding a vector for an equation for a line. In the question i'm given 2 points which both have the same distance to the Line.
Points (2,2) and (0,-2)
I managed to find a point on the line p:(1,0) by making a vector out of the 2 given points and then dividing it by half, and so on. But i have no idea how to get the vector. Anybody who can help? Thanks a lot. Been stuck here for like the past hour. Thanks again....
December 7th 2007, 05:52 PM
December 8th 2007, 07:48 AM
Thank you. But how did you get that vector? In the answer sheet it says (2,-1) but i guess its the same thing. How did you come up with (-2,1) ?? Thanks again.
December 8th 2007, 08:16 AM
Well just look at . That means that those vectors are parallel.
So we can use either one of them or any multiple of either.
As to how I found it: I just found a vector which is perpendicular to the given vector.
December 8th 2007, 08:44 AM
Oh yeah!! How silly i am. (ulv) = 0 makes them perpendicular to each other. Man i've forgotten so much. Thanks a bunch again!