Select the Mode Settings icon from the Home Screen, or press the j key.
Select among the angle mode settings (Radian, Degree, Gradian).
RADIAN DEGREE GRADIAN
Angle modes control how the calculator interprets angle values in trigonometric functions and
polar/rectangular conversions. The RADIAN or DEGREE or GRADIAN setting will display in the
status bar.
RADIAN mode interprets angle values as radians. Answers display in radians.
DEGREE mode interprets angle values as degrees. Answers display in degrees. Polar complex
number arguments are always interpreted in radians.
GRADIAN mode interprets angle values as gradians. Answers display in gradians. Polar
complex number arguments are always interpreted in radians.
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from the Home Screen, or press the j key.