Question

the frequecy domain is more compact and useful when we use are dealing with more than sign one wave​

Answer 1

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The frequency domain is more compact and useful when we are dealing with more than one sine wave. For example, Figure 3.9 shows three sine waves, each with different amplitude and frequency. All can be represented by three spikes in the frequency domain. The bandwidth is normally a difference between two numbers.

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Answer 2

Answer:

Note Page 23 3.23 The frequency domain is more compact and useful when we are dealing with more than one sine wave. For example, Figure 3.8 shows three sine waves, each with different amplitude and frequency. All can be represented by three spikes in the frequency domain.