Two particles describe the same circle of radius \( R \) in the same direction with the same spe...

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Two particles describe the same circle of radius \( R \) in the same direction with the same speed \( v \), then at the given instant relative angular velocity of 2 with respect to 1 will be
1) \( \frac{2 v \sin \frac{\theta}{2}}{R} \)
(2) \( \frac{v}{2 R \sin \frac{\theta}{2}} \)
(3) \( \frac{v}{R} \)
(4) \( \frac{v \cos \frac{\theta}{2}}{R} \)
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