Can you tell me what angular sensitivity the device is capable of? Is it less than 1°?
You can get 341 (1024 over 3 total G’s) discreet points per G-Force on high sensitivity mode (1.5 Gs) per axis which just on one axis would provide you with just under .5 degree accuracy. Presumably using two axis in tandem you can get it even more accurate.
Translating G-Forces to angular measurements requires some basic trig though.
Hope that answered your question.