If either vector a=0 or b=0, then a.b=0. But the converse need not be true .

Asked by  | 29th May, 2009, 11:57: PM

Expert Answer:

if  either vector a=0 or b=0, then a.b=0.  But if a.b = 0 then we cant conclude  that one of vectors a or b is zero

a.b =ab cos θ if θ is 90o  then cos 90o = 0 hence a.b will be zero even if both a and b are non zero vectors

Answered by  | 30th May, 2009, 01:56: PM

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