The curve above is the graph of a sinusoidal function. It goes through the points (...

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The curve above is the graph of a sinusoidal function. It goes through the points ( - 9,0) and (5,0). Find a sinusoidal function that matches the given graph. If needed, you can enter =3.1416... as 'pi' in your answer, otherwise use at least 3 decimal digits. please explain f(x)=? The curve above is the graph of a sinusoidal function. It goes through the points ( - 9,0) and (5,0). Find a sinusoidal function that matches the given graph. If needed, you can enter =3.1416... as 'pi' in your answer, otherwise use at least 3 decimal digits. please explain f(x)=?