13. If PxQ = 0and QxR=0 then PxR equal to
a) zero
b) PR sin ∅
C) PRcos ∅
d) PQ tan∅
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Answered by
3
Answer:
i think correct answer is zero
Answered by
1
Answer:
p×q=0 then |p|=0 or |q|=0 or both are zero
qxr=0 then |q|=0 or |r|=0 or both are zero
p,q are parallel or anti parallel to each other
q,r are parallel or anti parallel to each other
then pxr=0 as they are parallel or anti parallel to each other.
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