|Apr11-11, 08:35 AM||#1|
Cross Product proof
1. The problem statement, all variables and given/known data
(u X v) X w = u X (v X w) Iff (u X w) X v = 0
2. Relevant equations
(u X v) = -(v X u)
3. The attempt at a solution
I know that I am supposed to prove this by proving P --> Q and Q --> P
I know that if (u X w) X V = 0 then (u X w) is a scalar multiple of v.
How do i deduce Q from P and P from Q?
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