A community for students.
Here's the question you clicked on:
 0 viewing
Calcmathlete
 3 years ago
How would you do the cross product of a twodimensional vector? I've done threedimensional ones, but not twodimensional ones.
Calcmathlete
 3 years ago
How would you do the cross product of a twodimensional vector? I've done threedimensional ones, but not twodimensional ones.

This Question is Closed

oldrin.bataku
 3 years ago
Best ResponseYou've already chosen the best response.1The cross product is not defined in R^2.

Calcmathlete
 3 years ago
Best ResponseYou've already chosen the best response.0Then would I just say that there is no cross product?

oldrin.bataku
 3 years ago
Best ResponseYou've already chosen the best response.1Sorta  the cross product is not even applicable :) ... unless you want a threedimensional cross product, in which case you mean the vectors have an implicit zero component, e.g. \[u=ai+bj+0k\\ v = ci + dj + 0k\] You can find the threedimensional cross product, which makes sense  it's merely the surface normal to the plane defined.\[u \times v = (ad  bc)k\]

Calcmathlete
 3 years ago
Best ResponseYou've already chosen the best response.0Oh ok. So if I were to have this problem, (the actual problem), let vector a = < 1, 2 > and vector b = < 3, 4 >. FInd the magnitude of vector c if vector c = vector a x vector b. Would it 2?

oldrin.bataku
 3 years ago
Best ResponseYou've already chosen the best response.1It is wholly dependent on whether it expects you to do it in R^3  if not, then the question is silly because the cross product is not defined for R^2.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.