sin cos tan ln log sin⁻¹ cos⁻¹ tan⁻¹ log₂ n! MC MR M+ M− MS AC ⌫ ( ) ÷ π e x² √ × 7 8 9 x³ − 4 5 6 1/x + 1 2 3 % ∛ 0 . ×10ˣ ± =