How to Find \vec{b} in a Cross Product Problem?

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Discussion Overview

The discussion revolves around finding the vector \(\vec{b}\) in a cross product problem where \(\vec{a}\) and \(\vec{c}\) are given, specifically in the context of vector algebra and linear algebra concepts.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant expresses confusion about determining \(\vec{b}\) given \(\vec{a}\) and \(\vec{c}\) in the equation \(\vec{a} \times \vec{b} = \vec{c}\), seeking an analogous method to a simple division.
  • Another participant notes that there are multiple possible vectors \(\vec{b}\) that satisfy the equation, all of which lie in the plane perpendicular to \(\vec{c}\).
  • A participant asks about the method to find a vector that is perpendicular to another vector, indicating a potential exploration of geometric relationships.
  • One participant suggests the equation \(\vec{a} \times \vec{c} = \vec{b}\), asserting that \(\vec{b}\) is perpendicular to both \(\vec{a}\) and \(\vec{c}\).

Areas of Agreement / Disagreement

Participants do not reach a consensus on a specific method to find \(\vec{b}\), and multiple competing views regarding the relationship between the vectors remain present.

Contextual Notes

The discussion does not clarify the assumptions or definitions regarding the vectors involved, nor does it resolve the mathematical steps necessary to find \(\vec{b}\).

Who May Find This Useful

Individuals interested in vector algebra, particularly those studying cross products and their geometric interpretations.

FrankJ777
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I have a question about solving a problem involving a cross product. I understand how to find \vec{a} X \vec{b} = \vec{c}, but if \vec{a} and \vec{c} are given how do I find \vec{b}? Is there something I can do analogous to c/a =b? I've been reviewing my old calc III and linear algebra notes, but I havn't been able to figure it out. Any help would be most appreciated.

Thanks
 
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Given a and c, there are several possible vectors b such that a x b = c. They all lie in the plane perpendicular to c.
 
do you know how to find a vector that is perpendicular to another vector?
 
a x c = b

since b is a vector that is perpendicular to both a and c .. :-D
 

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