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