87 The plot of a time-domain function shows tiro palses of a periodic, repeating wareform fit)...
87 The plot of a time-domain function shows tiro palses of a periodic, repeating wareform fit) t (a) The wav efcem is to be represented by a Fourier series. What are the ferst three nonzero Fourier series terms (A) 2 cos(0.5mt) + 2 sin(nt) + 읊 sin(1.5mt) (B) 0.5 + 2 sin(0.5rt)喙sin(1.5m) (C) 0.5 + 2 cos(0.5nt) + sin(1.5nt) (D) π sin(0.brt) + 읊 sín(1.5nt)壕sin(2.5nt) 3T The graph shows a pulse in a communications signal. xlt) 1 t (s) What is the Fourier transform of the pulse? (A) sinc? (B) 2 sine 2f (C) 2 sinef (D) 2 sine2 2r