Verifying Vector Formula: A.B = B.A | Simple Homework Solution

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Homework Statement


Hi all my new friends..
A and B are vectors, A.B = B.A

Homework Equations





The Attempt at a Solution



How we can veryfy that this formula is correct?
 

Discussion

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I'm assuming you mean a scalar product.

A.B = ABcos(x)
B.A = BAcos(x)

AB = BA since arithmetic multiplication is commutative.
 

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