A particle moves along the x-axis in such a way that its acceleration at time t for t≥ 0 is given by a (t) = 4 cos(2t). At time t 0, the velocity of the particle is v (0) = 1 and its position is x (0) = 0. For what values of t, 0 ≤ t ≤ π, is the particle at rest? = O t = 7 and t = Ot=and t = O t = and t = t = 2 and t = 11T 6 11πT 12 7π 6 5п 12

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