Casio fx-991cw - C83

Model Name

FX-991CW

Number Of Digits

10 + 2 digits

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.

Number Of Functions

540+ Functions

Basic Function

• Basic Calculation
• Bracket Calculation
• Fraction Calculation
• Degree
Minute
Secound (Sexagesimal) Calculations
• Reciprocal Calculation
• Percent Calculation (scientific calculator function)
• Ratio calculation
•Factorial Function
• π
• Irrational number calcuation
• Rounding Function
• Transcendental number: e
• Base-n calculation
• Logical Operators
• Complex number calculation
• Matrix calculations
• Vector calculations
• Ratio calculation
• Continuous Calculation
• Replay Function
• Multi-replay Function
• UNDO
• SOLVE Function
• Independent Key x
• Absolute Value Calculation
• Square and square root (x2/√)
• Power and radical root (xy/x√)
• 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
10x
ex)
• Base specified logarithmic
• Coordinate Conversion
• Combination / Permutation
• Prime Factorization
• Random Number Generation
• Random Integer Generation
• Summation
• Scientific Constants
• Metric conversion function

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

162 X77X10.7 mm (D × W × H)

Country Of Origin

Thailand