4 1 16-15-14-13-12-11 -10 -9 -8 -6 -2 -3 78/9 10 11 12 13 The curve above is the graph of a sinusoidal function. It goes through the points (-12,0) and (2,0) 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. f(x) =