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JEE Advanced 2018 Paper 1

Section: Physics
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Question : 7 of 54
 
Marks: +1, -0
Two vectors
−
A
 and
−
B
 are defined as
−
A
=a
−
i
 and
−
B
=a(cosωt
−
i
+sinωt
−
j
), where a is a constant and ω=
Ï€
6
rad/s. If |
−
A
+
−
B
|=√3|
−
A
−
−
B
| at time t=Ï„ for the first time, the value of Ï„, in second, is
[JEE Adv 2018 P1]
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