Verify the Fourier coefficients given for the square wave in Figure 13–4 and write the first three nonzero terms in its Fourier series.

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Waveform Constant (dc) A Cosine wave fit) Fourier Coefficients a=0 all n b=0 all Waveform Fourier Coefficients Sawtooth wave fir) %=0 all s b=- To Triangular wave -To- To- AM Sine wave fin) AL-To- AM Square wave K(1) A ba=0 all n Q=0 a=0 all b = A b=0 1 ag=0 ag=0 a = A 9 0 1 -To- -A 9=0 a = 84 (x) a=0 be=0 nodd even Half-wave rectified sine wave a = fit) 2A/x even 1-2 A-T- %=0 odd b =4 =1 b=0 #1 Full-wave rectified sine wave 4-0 all n %=2A/x b = nodd A 4A/x 1-2 neven b=0 neven %=0 b=0 nodd Rectangular pulse fin To A ag= a=24-sin(x) b=0 all Parabolic wave AT A=0 %=0 all n 32A b = nodd (x) b=0 neven