fx-82MS fx-82TL fx-9860GII TI-83
Radian
On a Casio calculator you can enter an angle in radians
▷ ANGL r OPTN F6 F5 F2
or via the CATALOG as
CATALOG P
INPUT SHIFT 4 r(rad) F1
The value will be converted to the specified SET UP Angle.
Example 1
To convert an angle of 4.5 radians to 257.8310078° degrees
r 4 · 5 ≣ 4.5r EXE 4.5r 257.8310078