Add new comment

Behind the keyboard is a switch that may be set at R (radians) or D (degrees). The key should read G (gradians) or D (degrees). Wikipedia The gradian is a unit of measurement of an angle, equivalent to 1/400 of a turn, 9/10 of a degree, or π/200 of a radian. The gradian is defined as 1/100 of the right angle (in other words, there are 100 gradians in the right angle), which implies a full turn being 400 gradians. To change it radians, you press 2nd RAD.