Published by:
CGP EDU Academic Team
Published on: August 12, 2026
A unit vector a makes an angle 
with z -axis. If 
is a unit vector, then a is equal to
A
B
C
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
C
Let 
where 
a makes an angle 
with 
axis.
…..(i)
Its magnitude is 1, hence 
.....(ii)
From (i) and (ii), 
Hence 
.
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