Russian RPN calculator series Elektronika MK

[toml_12953]

(06-07-2019 03:51 AM)toml_12953 Wrote:  On my Электроника MK61, when I am degree mode tn(90) returns 6.3137516. inverse tn of that returns 90.

Is this normal behavior for this machine?

My bad! The angle selection switch looked like it was all the way to the right (degrees) but there must have been some dirt or something in it so I was getting results in grads. I moved the switch back and forth a few times and now it works fine. tn(90) gives eggog (Error).