How to insert a command in polar coordinates, with angle in radians ??
If it were in degrees, it would be for example 3.5 <45 ...
But in radians, what is the notation?
It seems you have run onto a bug (or is it a feature?) that has not been noticed up to now as hardly anybody in CAD uses radians. Nor have I. Now after having played around a bit I have found that indeed in the command line input you can only use decimal degrees whatever the drawing's settings are. A pity but true.