Vector question - North-east direction

In summary: So what does a x b have to be perpendicular to, in order for the entire expression to be zero?Right. So what does a x b have to be perpendicular to, in order for the entire expression to be zero?a x ba x b
  • #36
haruspex said:
What is the angle between the two vector arguments to the central x?
Zero. Sin 0=0
 
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  • #37
gracy said:
Zero. Sin 0=0
So what is (a x b) x (a x b)?
 
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  • #38
haruspex said:
So what is (a x b) x (a x b)?
zero
 
  • #39
gracy said:
zero
Right.
 
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