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is cross product the same as dot product?
i see that they arent.... i was sooo close lol
yeah they aren't the same
is cross priduct orthogonal? they perpendicular to each other then?
i was just reading up on vectors last night... if 2 vectors are othogonal, they have -1 as the product of their slopes... we wouldnt happen to know the vector quantities would we...
no, the question I asked is really all the information given :(
||a x b ||^2 = ||a||^2 ||b||^2 - (a.b)^2...does that help us any? :)
is that like the law of cosines? o_O
<3xa+2xb , 3ya + 2yb> right?
lol.....wish I knew
would it be asking this then? <3xa+2xb , 3ya + 2yb> (x)
well actually i think i'd need to add the z-component, since we'd get a 3-D vector
i gots no idea how to add a z component in there ;)
what would 3a x a = ? is it still a vector a multiplied by smtg?
oh wait it would be 0 right o_o
ohh I figured it out! :) haha. Ok i wasn't sure but there's the property that (3a + 2b) x a = 3a x a + 2b x a = 0 + 2b x a... omg -_-
thats a nice property to know then ;) good job!
oye our prof never showed it to us :( Lol glad that was actually easy now xD thx for ur help nevertheless :)