No need to show work, just do it ASAP please.

1.

\f.15-14-18-12 -17-10 -9 -8 -7 /6 -5 -4 -3 -2 4 6 7 /8 9 10 17 12 73 The curve above is the graph of a sinusoidal function. It goes through the points ( - 13, 0) and (1, 0). Find a sinusoidal function that matches the given graph. If needed, you can enter 7=3.1416... as 'pi' in your answer, otherwise use at least 3 decimal digits. f(x) =