Communication Theory (Electrical Engineering)

[aprilg8888]

Homework Statement

Sketch the single-side and double-sided amplitude and phase spectra of

Homework Equations

a) Xa(t)=5cos(12∏t-pi/6)

b)Xc(t)=4cos(8∏t)cos(12∏t)

The Attempt at a Solution

I have no idea how to start off this problem

 

[berkeman]

Homework Statement

Sketch the single-side and double-sided amplitude and phase spectra of

Homework Equations

a) Xa(t)=5cos(12∏t-pi/6)

b)Xc(t)=4cos(8∏t)cos(12∏t)

The Attempt at a Solution

I have no idea how to start off this problem

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