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rad2deg(expr0) ⇒ number
The rad2deg() function returns the value of the argument converted from radians to degrees, as a number. The conversion is as follows:
According to the International System of Units (SI), the symbol for degree is ° and the symbol for radian is rad.
Tip: To make a degree sign (°) on a Windows computer, press and hold the Alt key and type the number 0176, not 176, on the number keypad.