Given the waveform in Fig. 15PFE-1, determine if the trigonometric Fourier coefficient an...

Given the waveform in Fig. 15PFE-1, determine if the trigonometric Fourier coefficient an has zero value or nonzero value and why.

Figure 15PFE-1

a. an = 0 for n even due to half-wave symmetry

b. an = 0 for all n due to odd symmetry

c. an is finite and nonzero for all n

d. an is finite and nonzero for n even