The sine values in degrees oscillate from -1 to +1. The angles between 0° and 90° have positive values starting from 0 and ending at +1. All values of the sine in degrees repeat cyclically. You can calculate them with the following relationships:
sin(α + 90°) = sin(90° - α);
sin(α + 180°) = -sin(α); and
sin(α + 270°) = -sin(90° - α)
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