Of course you may ask a question, that's what a forum is all about!
The default mode for angles is radians, and when your calculator was reset that was the angle mode it defaulted to. You should have a mode key, which when pressed will allow you to change angles back to degrees. I'm not sure of the exact way to do this on your calculator, but on my TI-89 Titanium, I press the mode key, then go down to angle and hit enter then choose between radians and degrees.
If yours is substantially different, consult your user's manual for the correct procedure to change the angle mode.
Living in the pools, They soon forget about the sea...— Rush, "Natural Science" (1980)