For each of the following functions, determine both the complex frequency s as well as s": (a) 7e–9t sin (100t + 9°); (b) cos 9t; (c) 2 sin 45t; (d) e' cos 7t.

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Frequency Modulation

Frequency modulation is a method or process of encoding the data of a specific signal (analog or digital) by modulating the carrier wave frequency according to the frequency of the modulated signal. Modulated signals are nothing more than information or data that should be conveyed after being converted into electronic signals.