CASIO Scientific Calculator FX-991ex Classwiz

Specifications

• Number of Functions: 552
• Two-way power (Solar + LR44 × 1)
• Approximate battery life: 2 years (LR44)^*1
• Dimensions H × W × D (mm): 11.1 × 77 × 165.5
• Approximate weight (g): 90
• Case style: Slide-on hard
• Dot matrix display: 192 × 63 dots
• Mantissa + exponent digits: 10 + 2
• Internal operation digits: 15
• Nested parentheses levels: 24

Utilities

• Natural textbook display / NATURAL-V.P.A.M.
• Key rollover function
• Replay function
• Multi-replay functions
• Backspace
• CALC function
• SOLVE function
• Answer function
• Variables:9
• Auto power off
• UNDO
• Digit separator
• Multiline display

Special Features

• Base-n calculations (Binary/Octal/Hexadecimal)
• Logical operations
• Engineering symbol calculations
• Engineering notation (ENG/ENG)
• Scientific constants : 47
• Metric conversions : 40

Basic Functions

• Trigonometric, inverse trigonometric (sin/cos/tan/sin^-1/cos^-1/tan^-1)
• Hyperbolic, inverse hyperbolic (sinh/cosh/tanh/sinh^-1/cosh^-1/tanh^-1)
• Exponential, logarithmic (log, ln, 10^x, e^x)
• Base specified logarithmic
• Square and square root (x²/ √ )
• Cubic and cubic root (x³/ ³√ )
• Power and radical root (x^y/ x√ )
• Fraction
• Percentage calculation (%)
• Rounding
• Sexagesimal ↔ decimal
• Display format (FIX, SCI)
• Angle unit (Degree, Radian, Gradian)
• Angle unit conversion (Degree, Radian, Gradian)
• Factorization into prime factors
• Ratio calculation

Calculus

• Differentiation calculation
• Integration calculation

Algebra

• Simultaneous equation : (4 unknowns)
• Polynomial equation : (Degree 2, 3, 4)
• Inequality calculation
• Table function
• Matrix calculations
• Complex number calculation

Geometry

• Coordinate conversion (Pol, Rec)
• Vector calculations

Probability

• Combination, permutation (nCr, nPr)

Statistics

• Random numbers
• Random integers
• List-based STAT data editor
• Standard deviation
• Regression analysis
• Linear regression
• ab exponential regression
• Other regression: Log, Exp, Pwr, Inv, Quad
• Advanced statistical distribution calculations