1. My TI-85, ROM 10, gives the radian answer even if in degree mode. 2. This isn't a bug. It just so happends to be that e^complex relates to angles. You can't give it degrees though. you shouldn't be able to. This is a non-trigonometric instruction that happends to operate like a trig instruction. the ti-8x is correct in treating it as radian in any mode.