QUESTION

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7. Find the Fourier series coefficients for each of the following signals: (a) $x(t)=\sin \left(10 \pi t+\frac{\pi}{6}\right)$ (b) $x(t)=1+\cos (2 \pi t)$ (c) $x(t)=[1+\cos (2 \pi t)]\left[\sin \left(10 \pi t+\frac{\pi}{6}\right)\right]$ Hint: You may want to first multiply the terms and then use appropriate trigonometric identities.

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