Can someone plz explain how to determine if the if the vector is parallel if given vectors a and b?

Question

raffle_snaffle · Answer

using the dot product

amistre64 · Answer

if the ratio of parts is equal ....

amistre64 · Answer

define the unit vectors, and if they dot to 1 they are they are in the same direction;  -1 is in the opposite direction

raffle_snaffle · Answer

okay that is what I thought just wanted to verify. When I think of parallel I think of taking two twigs and putting them right next to each other with no angle involved.

raffle_snaffle · Answer

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amistre64 · Answer

spose a=<1,2,3>, and b = <4,8,12> the ratio of parts b/a is: b = <4,8,12> -------- = (4,4,4) a = < 1,2, 3>

amistre64 · Answer

cos(0) = 1,  cos(pi) = -1

so unless you get either of thos, they aint parallel

zzr0ck3r · Answer

hey thats a cool @amistre64 good idea:)

amistre64 · Answer

thnx :)

zzr0ck3r · Answer

zach you should know what parallel means at this point:P

zzr0ck3r · Answer

im about to get on the plane back to oregon

raffle_snaffle · Answer

Haha I know.

zzr0ck3r · Answer

ill shoot you a text later.

raffle_snaffle · Answer

sounds good. wait a min Zach

raffle_snaffle · Answer

nvm I will ask you next time I see you.