(Solved): For the given periodic signal, find trigonometric fourier series coefficients and find the amplitude ...

For the given periodic signal, find trigonometric fourier series coefficients and find the amplitude and phase of 3rd harmonic.

7. For the given periodic signal, a) Find trigonometric Fourier Series coefficients. (ao, \( a_{n} \) 's and \( b_{n} \) 's) b) Find the amplitude and phase of \( 3 r d \) harmonic \( \left(C_{3}\right. \) and \( \left.\theta_{3}\right) \). (Compact Fourier Series Coefficient of \( \left.C_{3} \cos \left(3 w_{o} t+\theta_{3}\right)\right) \).