[Digital Signal Processing - Principles, Algorithms & Applications][Proakis & Manolakis][3rd Ed. 1996]
Dea.brunel.ac.Uk Cmsp Home Saeed Vaseghi Chapter04-Z-Transform
Ch 4 Trig Functions. 4.1 Radian and Degree Measures Converting from Radians to Degrees Converting from Degrees to Radians.
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