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kirbykirby
 5 years ago
For any 2 vectors a,b the cross product "(3a + 2b) x a" is the same vector as:
a) 2a x b
b) 2b x a
c) 3a x b
d) 3b x a
e) 5b x a
kirbykirby
 5 years ago
For any 2 vectors a,b the cross product "(3a + 2b) x a" is the same vector as: a) 2a x b b) 2b x a c) 3a x b d) 3b x a e) 5b x a

This Question is Closed

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0is cross product the same as dot product?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0i see that they arent.... i was sooo close lol

kirbykirby
 5 years ago
Best ResponseYou've already chosen the best response.0yeah they aren't the same

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0is cross priduct orthogonal? they perpendicular to each other then?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0i 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...

kirbykirby
 5 years ago
Best ResponseYou've already chosen the best response.0no, the question I asked is really all the information given :(

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0a x b ^2 = a^2 b^2  (a.b)^2...does that help us any? :)

kirbykirby
 5 years ago
Best ResponseYou've already chosen the best response.0is that like the law of cosines? o_O

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.03<xa,ya> + 2<xb,yb> <3xa+2xb , 3ya + 2yb> right? lol.....wish I knew

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0would it be asking this then? <3xa+2xb , 3ya + 2yb> (x) <xa,yx>

kirbykirby
 5 years ago
Best ResponseYou've already chosen the best response.0well actually i think i'd need to add the zcomponent, since we'd get a 3D vector

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0i gots no idea how to add a z component in there ;)

kirbykirby
 5 years ago
Best ResponseYou've already chosen the best response.0what would 3a x a = ? is it still a vector a multiplied by smtg?

kirbykirby
 5 years ago
Best ResponseYou've already chosen the best response.0oh wait it would be 0 right o_o

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0cant recall :) do you know where this mystery vector is supposed to be attached? I got this so far...but I may be wrong.

kirbykirby
 5 years ago
Best ResponseYou've already chosen the best response.0ohh 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 _

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0thats a nice property to know then ;) good job!

kirbykirby
 5 years ago
Best ResponseYou've already chosen the best response.0oye our prof never showed it to us :( Lol glad that was actually easy now xD thx for ur help nevertheless :)
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