# PreCalculus

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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

• PreCalculus -

a sin curve has a sinusoidal velocity, goes to 0 at the ends and is maximum at the center.
This has a constant speed, so square wave velocity.

• PreCalculus -

I still don't quite understand this.

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