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Solution to Exercise 1.4.1
![As\ cos(\alpha +\beta)=cos(\alpha)cos(\beta)-sin(\alpha)sin(\beta),cos(2\pi(f+1)n)=cos(2\pi fn)cos(2\pi n)-sin(2\pi fn)sin(2\pi n)=cos(2\pi fn)](/system/files/resource/9/9648/9659/media/eqn-img_2.gif)
Solution to Exercise 1.4.2
A square wave takes on the values 1 and −1 alternately. See the plot in the module Square Wave
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Solution to Exercise 1.4.1
Solution to Exercise 1.4.2
A square wave takes on the values 1 and −1 alternately. See the plot in the module Square Wave
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