Casio fx-991ES PLUS 2nd edition - C79

Display Type

Natural Textbook display - Input and display fractions, powers, logarithms, roots, and other mathematical formulas and symbols just as they appear in textbooks.

Power Supply

Both Solar and Battery powered. Solar powered when light is sufficient, battery powered when light is insufficient.

Plastic Key

Designed and engineered for easy operation.

Number of Functions

417 Functions

Basic Function

• 10 + 2 digits
• Matrix and Vector calculations
• Natural Textbook Display
• Multi-replay (Quick and easy recall of previously executed formulas for editing and re-execution)
• Fraction Calculation
• Table Function
• Prime Factorization
• Metric Conversions
• Complex number calculations
• Integration/differential calculations
• 9 variables
• Exponent functions, Logarithmic functions
• Power functions (square root, cubic root, square, power)
• Coordinate conversion (Pol, Rec)
• Combination/Permutation (nCr, nPr)
• Factorial, Random numbers, Random sampling of an existing list, Fractions
• Logical operations
• Hyperbolic functions, Inverse hyperbolic functions
• Base-n calculations/conversions
• Angle unit, Angle unit conversion (Deg, Rad, Gra)
• Trigonometric functions, Inverse trigonometric functions
•Statistics (List-based STAT data editor, standard deviation, regression analysis)

Hardware

• Battery - Solar and Battery
• Plastic keys
• Comes with slide on hard case

Coordinate Conversion

Dedicated keys to convert polar coordinates to rectangular coordinates and vice versa.

Angle Unit Degree Radian Gradian

Specifies degrees, radians, grads as the angle unit for value input and calculation result display.

Minute Degree Seconds

Aids in sexagesimal calculations with respect to decimal conversion.

Warranty Years

3 years

Dimension

161.5x77x11.1mm