Pre Calc--- Repost

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I already asked this, but I didn't really understand the answer I got. I got the general idea, but I don't have a good enough understanding to answer the question.


Writing to Learn: In a certain video game a cursor bounces back and forth horizontally across the screen at a constant rate. Its distance d from the center of the screen varies with time t and hence can be described as a function of t. Explain why this horizontal distance d from the center of the screen does not vary according to an equation d= a sin bt, where t represents seconds. You may find it helpful to include a graph in your explanation

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