Let
,
and
Find a vector
which is perpendicular to both
and
and
[CBSE 2018]
Since
is perpendicular to both
and
, therefore, if its parallel to ![]()
∴ ![]()
= 
= ![]()
= ![]()
It’s been given that,
![]()
![]()
![]()
∴ ![]()
.
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