Casio FX-991DE CW

Casio FX-991DE CW

Scientific calculator with FULL DOT display and 680 functions

Display:

• 63 x 192 FULL DOT
• Natural display
• Algebraic input logic: Natural-V.P.A.M.
• Number of characters/lines: 17/1+10/1
• Icon Menu
• Display with 4 shades of grey
• Display mantissa - exponent: 10+2

Memory:

• Repeat function
• 9 variable memories

Mathematics:

• 680 functions
• 47 scientific constants
• 164 unit conversions
• 24 bracket levels
• Fractions
• Angle measurements: DEG/RAD/GRAD
• Conversions between >DEG/>RAD/>GRAD
• Coordinate conversion pole ÷ rec
• trigonometric functions: sin/cos/tan/sin-1/cos-1/tan-1
• hyperbolic functions: sinh/cosh/tanh/sinh-1/cosh-1/tanh-1
• Exponential, logarithm (In, 10x, ex )
• mathematical functions √, x², x-1, 1/x, x!, xy, x1/y
• Calculations in base n (hexadecimal/decimal/binary/octal)
• logical operators (AND/Or..)
• Calculations in the sexagesimal system
• Percentage calculation
• remainder function
• prime factorisation
• technical notation: ENG/ENG
• Calculation with technical symbols
• Calculation of complex numbers
• Random number generator
• Integer random numbers
• Calculation of minimum or maximum of a quadratic function
• ggT/kgV function
• 4 x 4 matrix calculation / vector calculation         
• REF/RREF function
•  Equation calculation
• Inequality calculation
• Verify function
• Table of values: f(x) & g(x)
• Periodic decimal fraction

Statistics:

• Summation of ∑x, ∑x²
• Standard deviations f. grouped and ungrouped values
• Distribution functions (normal distribution, inverse normal distribution,
• binomial distribution, Poisson distribution)
• Regression analysis
• Permutation (nPr), combinatorics (nCr)
• Maths Box (random experiments with coins and dice)
• Differential and integral calculus
• numerical integral calculus
• numerical differential calculus

 Miscellaneous:

• German menu language
• Spreadsheet
• QR code function
• Hardcase
• Automatic switch-off
• Power supply: solar + battery 1 x LR44 (AG13)
• Dimensions: (H x W x D) 10.7 x 77 x 162 mm
• Weight: 95 g