Accuracy of Free42 and DM42

[Thomas Okken]

(12-20-2017 08:36 PM)Dieter Wrote:  

(12-20-2017 08:26 PM)Thomas Okken Wrote:  It sounds like you're using an old version, from before I added Werner Huysegoms' angle reduction logic for DEG- and GRAD-mode trigs.

Sure. That's why I wrote "so I started my good old 2014 version of Free42 Decimal". The menu says it's version 1.5.5. I looks like I installed it November 2014. ;-)

When has this new angle reduction logic been added? And why does the angle reduction method make a difference for a 45° angle ?

Dieter

The change history is here.
Although, on second thought, 18 digits of noise is way too much to be explained by missing angle reduction, especially when the argument is 45°. That sounds more like I was still using a 16-digit approximation of pi, but I don't see mention of that in the change history... I'd have to check the old sources to confirm. Since I'm in bed with a nasty cold right now, that kind of detective work will have to wait.