Asked by  | 6th Oct, 2012, 07:33: PM

Expert Answer:

This is possible only if they are perpendicular to each other
|A±B| = |A|2+|B|2±2|A||B|cos?
if ? = 90 degree
thus |A±B| = |A|2+|B|2
as cos 90 = 0

Answered by  | 6th Oct, 2012, 07:40: PM

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