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The angular speed of a particular cog in a machine is given by: w(t) = Kcos (2T) +M where K = 0.57 rad s,

The angular speed of a particular cog in a machine is given by: w(t) = Kcos (2T) +M where K = 0.57 rad s, T = 4.5 s, and M = 0.029 rad s-1 What is the angular acceleration a of the cog at a time of 12 s?

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