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