sin cos tan 7 8 9 + Back sin^-1 cos^-1 tan^-1 π e 4 5 6 − M+ x^y x³ x² e^x 10^x 1 2 3 × M- y√x ³√x √x ln log 0 . EXP / MR ( ) 1/x % n! ± RND AC = Use