Projection and Sinusoidal Motion

Recall from our previous section on sinusoids that the projection of a rotating sinusoid on the and axes, traces out a cosine and a sine function respectively.

**Figure 4:** Projection on the and axis.
$\scalebox{0.9}{\includegraphics{eps/circ_sin_cos.eps}}$

``Music 270a: Complex Exponentials and Spectrum Representation'' by Tamara Smyth, Department of Music, University of California, San Diego (UCSD).

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