Q. 15.0( 1 Vote )
Mark (√) against the correct answer in each of the following:
A unit vector in the direction of the vector 
is
A. 
B. 
C. 
D. none of these
Answer :
Tip – A vector in the direction of another vector 
is given by 
and the unit vector is given by 
So, a vector parallel to 
is given by 
where 
is an arbitrary constant.
Now, 
Hence, the required unit vector
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