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JEEMAIN-2015
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Q)
A vector
→
A
is rotated by a small angle
Δ
θ
radian
Δ
θ
<
1
)
to get a new vector
→
B
. In that case
|
→
B
−
→
A
|
is :
0
|
→
A
|
(
1
−
Δ
θ
2
2
)
|
→
A
|
Δ
θ
|
→
B
|
Δ
θ
−
|
→
A
|
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