Question: You are given the ideal lowpass filter with input as shown in Fig. An error function is defined as the difference between the input and the output; that is,
e(t) = r(t) - s(t)
![1979_3.3.2.png](https://secure.tutorsglobe.com/CMSImages/1979_3.3.2.png)
Find the error function if the filter cutoff frequency is
(a) fm = 2.5 Hz
(b) fm = 3.5 Hz
(c) fm =4.5 Hz