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If ` vec A , vec B and vec C` are non-zero vectors and ` ec A. vec B=0 and vec B. vec C=0`, then find out the value ` vec A .vec B` |
Answer» As ` vec A. vec B=0` , :. ` AB cos theta =0 or theta =0 or theta_(1) =90^(@)`, Similarly , ` vec B. vec C=0 , :. BC cos theta _(1) =0 or cos theta =0 or theta_(1) =0 or theta _(1) =90^(@), i.e ` vec A and vec C` are parallel to each other. :. vec A. vec C = AC cos 0^(@) = AC. |
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