Q. 25
Mark (√) against the correct answer in each of the following:
The unit vector normal to the plane containing 
and 
is
A. 
B. 
C. 
D. 
Answer :
Given - 
To find – A unit vector perpendicular to the two given vectors.
Formula to be used - 
where 
and 
Tip – A vector perpendicular to two given vectors is their cross product.
The unit vector of any vector 
is given by 
Hence,
, which the vector perpendicular to the two given vectors.
The required unit vector 
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