Question

13. If PxQ = 0and QxR=0 then PxR equal to
a) zero
b) PR sin ∅
C) PRcos ∅
d) PQ tan∅​

Answer 1

Answer:

i think correct answer is zero

Answer 2

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.