Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Let 
a i > 0, i = 1, 2, 3 be a vector which makes equal angles with the coordinates axes OX, OY and OZ. Also, let the projection of 
on the vector 
be 7. Let 
be a vector obtained by rotating 
with 90°. If 
and x-axis are coplanar, then projection of a vector 
on 
is equal to
A
B
C
2
D
7
Text Solution
Verified by ExpertsThe correct answer is:
B
Now projection of 
on 
= 7
now 
Projection of 
on 
is
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