AWOL:
Small angle sine approximation doesn't work that well for angles in degrees.
calculation are made in radiant and translated to degree for easy reading
dhenry:
so each "bit" corresponds to 1/256g. or 90/256 ~= 0.4 degree, in theory.In reality, you would be lucky to get to within 2-3 degrees.
i can understand drift and other approximation/errors give you to wrong value, but i still cant' understand where this "90/256 ~= 0.4" come from, in particular the "90"