All-purpose Calculator Ravi’s Professional CalculatorRavi’s CalculatorProfessional Scientific Calculator0 Basic Scientific M DEG AC CE % / MR 7 8 9 × MC 4 5 6 – M+ 1 2 3 + M- 0 . ± = sin cos tan log ln sin⁻¹ cos⁻¹ tan⁻¹ √ xʸ π e x! EXP DEG/RAD ( ) AC CE =