Hi, To change the default angle unit, you press the [MODE] button a
certain number of times until display shows a rectangle inside which Deg Rad Grad appear on the top line and 1 2 3 on bottom line, with 1 under Deg, 2 under Rad, and 3 under Grad. Press
the number key corresponding to your case, 1. All angle values you feed
the trigonometric functions will be considered to be in degrees. If you
use the inverse trigonometric functions to find angles, the results
will be in degrees.
Hope it helps. Thank you for using FixYa and do not forget to rate this free solution.