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CBSE Class 11-science Answered

What is the angle between two vectors -2i+3j+k and i+2j-4k?
Asked by | 28 Feb, 2013, 05:27: PM
Expert Answer
A=-2i+3j+k
B=i+2j-4k
A.B=(-2i+3j+k).(i+2j-4k)
     =0
AB cos?=0
?=90
Answered by | 28 Feb, 2013, 05:50: PM
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