2 11 -10 -9 -8 -7 -6 -5 /-4 -3 -2 -1 2 3 4 5/6 7 8 9 -2 The curve above is the graph of a sinusoidal function. It goes through the points ( – 9, 0) and (1, 0). Find a sinusoidal function that matches the given graph. If needed, you can enter T=3.1416... as 'pi' in your answer, otherwise use at least 3 decimal digits. f(x) = %3D

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