Cross Product

  • Thread starter Midas_Touch
  • Start date
  • #1
Midas_Touch
I have two vectors A = 2x + 3y - 4z and B = -6x - 4y + z. The problem asks me to find the component of A X B along the direction of C = x - y + z. So I did put A and B into a matrix, but I didn't get the correct answer, which is -14.4. What am I doing wrong?
 

Answers and Replies

  • #2
mezarashi
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First, find the vector D = A X B.
Then find the unit vector in the C direction.
Finally dot D with the unit vector of C.
 
  • #3
Midas_Touch
mezarashi said:
First, find the vector D = A X B.
Then find the unit vector in the C direction.
Finally dot D with the unit vector of C.
I got -15 instead of -14.4 (the answer from the back of the book). I am not sure why it's a little off.
 
  • #4
mezarashi
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I can only suggest an algebriac mistake.
 

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