3.Let v denote the vector in two dimensions with magnitude V and direction α, and let w denote the vector in two dimensions with magnitude W and direction β. We know that v*w=V W cos(α-β). (1)
a) Express v and w in terms of the unit vectors i and j
b.) Using the expressions obtained in part a), calculate v*w and show that the result is equivalent to (1)
Vector application
2010-10-01 6:39 am
回答 (1)
2010-10-01 8:35 am
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