Free42 with IEEE 754-2008 decimal floating-point -- interested in a sneak preview?

[Werner]

Thanks, see my update in the previous post: it's 10^x that is the culprit.
As for SIN(45°) ^ = COS(45°), you left out one line of code wrt mine:

if x = 45 then x := SQRT(0.5);
else do

if x > 45 -- SIN(90°-x) = COS(x) and vice versa
then do
x := 90 - x;
if fSIN then fSIN := FALSE;
else fSIN := TRUE;
end;

if fSIN then x := SINDEG(x);
else x := COSDEG(x);

end;

That's all. (only looked at this part, not the GRADS, not the addition of complex numbers in polar mode etc..)
Cheers, Werner