Problem: Consider the waveform x(t) shown below.
The above signal x(t) consists of a DC component plus a sinusoidal signal. (The terminology DC component means a component that is constant versus time.)
a. What is the frequency of the sinusoidal component?
b. Write an equation for the signal x(t) in the form x(t) in the form x(t) = B + Acos(ωot + ø) where -π , ø < π.
You can determine numerical values for all the amplitude, frequencies, and phases in your equation by inspection of the above graph.
c. Plot the two sided spectrum of the signal x(t). Show the complex amplitude for both the positive and negative frequency components contained in x(t).