Professional Scientific Calculator DEG 2ND M 0 main abc func RAD DEG GRAD 2nd ◷ ⧉ ☾ MC MR M+ M− MS AC sin sin⁻¹ cos cos⁻¹ tan tan⁻¹ sinh sinh⁻¹ cosh cosh⁻¹ tanh tanh⁻¹ ln log log₂ √ x² x³ xʸ 1/x |x| x! π e EXP 10ˣ eˣ floor ceil round RAND mod nCr nPr ⁿ√ ( ) % 7 8 9 4 5 6 1 2 3 0 . ANS π e ← ÷ × − + ( ) +/− , SCI DEL C =