A unit vector in 
-plane that makes an angle 
with the vector (
and an angle of 
with the vector (
, is
a)
b)
c)
d)
None of these
A unit vector in -plane that makes an angle with the vector ( and an angle of with the vector (, is
a)
b)
c)
d)
None of these
Question ID - 52479 | SaraNextGen Top Answer
A unit vector in -plane that makes an angle with the vector ( and an angle of with the vector (, is
a)
b)
c)
d)
None of these
|
A unit vector in |
|||||||
|
a) |
|
b) |
|
c) |
|
d) |
None of these |
1 Answer
127 votes
Answer Key / Explanation : (d`) -
(d)
Let the unit vector in 
-plane be 
.
Since, 
is a unit vector.
=1
…(i)
Again 
…..(ii)
On solving Eqs. (i) and (ii), we get
No value in the given options satisfies the above relations.
Thus, option (d) is correct.
127 votes
Answer Link
127