1. Given the following sum of two signals. Plot the spectrum of this signal. x(t) = 5 + 20 cos(20πt+4)+ √√2 cos(30t+ π/2)

* = multiply. Thanks

Please answer in typing format solution please only typing format Plyi t rightarrow Please I will like it please

signal system

Can you please answer

Calculate the following complex numbers and express the results in polar form:

If x(t) = sinc(t-10), what is the energy of x(t)? 10 None of the other answers 10 272 10 2.

Dado el sistema de retroalimentación unitaria: G(s) = K(s+4) s(s+1.2)(s+2) a. El rango de K que mantiene estable el sistema. b. El valor de K que hace oscilar el sistema. c. La frecuencia de oscilación cuando K se establece en el valor que hace oscilar el sistema.

3. Regarding the plotted waveform below: (a) Does it have dc symmetry? (b) Does it have even symmetry? (c) Does it have odd symmetry? (d) What is its period? (e) What is its angular frequency? (f) What is its oscillation frequency? (g) What is a piecewise expression V(t) for one period? 11-10-9 4 VI A 10 12 3 2 H -H -2 -3 8 9 10 11 12 1

Determine which waveform in each of the following pairs is lagging: (a) cos 4t, sin 4t(b) cos (4t-80 ), cos (4t)(c) cos (4t+80), cos 4t(d) -sin 5t, cos (5t+2)(e) sin 5t + cos (5t-45) Can someone please help me with this problem and kindly show your solution step by step so that I can comprehend it well. thank you very much for your help.