Question
Thu February 28, 2013 By:
 

What is the angle between two vectors -2i+3j+k and i+2j-4k?

Expert Reply
Thu February 28, 2013
A=-2i+3j+k
B=i+2j-4k
A.B=(-2i+3j+k).(i+2j-4k)
     =0
AB cos?=0
?=90
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