Determine if three vectors form a right hand triple?

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SUMMARY

To determine if three vectors form a right-hand triple, one must understand the definition of a right-hand triple, which involves the orientation of the vectors in three-dimensional space. The confusion often arises from the misconception that the dot product must be zero for the vectors to be orthogonal; however, the correct approach involves using the cross product. The equation (a-b) x (a+b) = 2(a x b) illustrates the properties of the cross product, specifically its distributive and anti-commutative nature.

PREREQUISITES
  • Understanding of vector operations, specifically cross product and dot product.
  • Familiarity with three-dimensional geometry and vector orientation.
  • Knowledge of algebraic properties of vector multiplication.
  • Basic concepts of linear algebra, particularly regarding orthogonality.
NEXT STEPS
  • Study the properties of the cross product in vector algebra.
  • Learn about the geometric interpretation of right-hand triples in three-dimensional space.
  • Explore the relationship between dot products and orthogonality in vector sets.
  • Investigate the implications of anti-commutativity in vector operations.
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Students studying linear algebra, physics majors focusing on mechanics, and anyone interested in vector calculus and three-dimensional geometry.

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Homework Statement


ok can someone tell me how to determine if three vectors form a right hand triple? and why does (a-b)x(a+b)=2(axb)...

please someone help, I am really confused on how to do these... arent just three vectors a right hand triple if the dot product between them all is 0?? I am not sure though please someone help.. and the second one.. the must be a formula or a property i can't find... thanks
 
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fredrick08 said:

Homework Statement


ok can someone tell me how to determine if three vectors form a right hand triple? and why does (a-b)x(a+b)=2(axb)...

please someone help, I am really confused on how to do these... arent just three vectors a right hand triple if the dot product between them all is 0?? I am not sure though please someone help.. and the second one.. the must be a formula or a property i can't find... thanks
Well, first of all what is the definition of "right hand triple"? That would seem a good place to start!

For the second, I assume that you are talking about the cross product of vectors. (a- b)x(a+ b)= what if you just go ahead and multiply it out (the distributive and associative laws of multiplication are true for the cross product). Now remember that cross product if anti-commutative. What is axa? What is bxb?
 

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