Problems 6775. The purpose of these problems is to keep the material fresh in your mind so

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Problems 67–75. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for later sections, a final exam, or subsequent courses such as calculus.

The displacement d (in meters) of an object at time t (in seconds) is given by d(t) = 2 cos(4t).

(a) Describe the motion of the object.

(b) What is the maximum displacement of the object from its rest position?

(c) What is the time required for 1 oscillation?

(d) What is the frequency?

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