Last Activity: 12 Years ago
-AB
The answer given is AC. But I wan''t to know how?
Last Activity: 11 Years ago
Given:
a.b=0 (a is perpendicular to b)
b.c=0 (b is perpendicular to c)
thus b is perpendicular to both a and c.
Therefore, a.c=0; if they are distinct vectors and if they are same then a.c=a.a=1
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