Chapter 3 Fourier series 08 sin cloT 丌 05 sin c(oT) 0.4 17;2z Isin (oT) 0.2 0 -0.2 -0.4 -1.5 0.5 0.5 T固定,a的包络2Tsnc7定 88 Chapter 3 Fourier Series ( )   1 1 sin T = c T ( )   2 1 1 sin T = c T ( )   3 1 1 sin T = c T T1固定，Tak 的包络 2T1 sin c(T1 )固定