Find a sinusoidal model for the situation, without a horizontal shift. The maximum value is 15 and occurs at t=0, 6, 12, and so on, and the minimum value is 5 and occurs at t 3, 9, 15, and so on. The model is P(t) =

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.