3.3-9 Find the Fourier transform of the signal in Fig. P3.3-3a by three different methods: (a) By direct integration using the definition (3.8a). (b) Using only pair 17 Table 3.1 and the time-shifting property. (c) Using the time-differentiation and time-shifting properties, along with the fact that 8 (r) 1. Hint: 1-cos 2x = 2 sin²x. 1 -T 0 T (a)