Consider two sinusoidal oscillations and 2 of equal amplitude A such that = Asin (2 fit) and 2 = A sin (27 f2t), where fi and f2 are their frequencies in Hz and t is the time in seconds. When combined they produce a signal +2 as shown in Figure 1. Use the data in the graph to deduce the values of f1, f2 and A (assume fi > f2). 10 0 -10 Y/mm 0.1 Part A The value of f = 0.15 Figure 1: A graph showing the combined signal as a function of time. -t/s XA