Casio Fx-991es Plus 2nd Version Scientific Function Calculator FX-991ES PLUS -2ND

Product Description:

- Natural-V.P.A.M. (Visually Perfect Algebraic Method) display

- Dot matrix display with 31 x 96 pixels

- 15 and 10 + 2 digits

- 417 functions

- Equation solver

- 20 pairs of metric conversions

- Calculation with complex numbers

- Recall key (temporary formula memory)

- 40 physical constants

- Matrix / vector calculations

- Numerical integral and differential calculations

- Random integers

- New equation mode

- Function table

- Dual-Power

- Display

  - Screen type: 31 * 96 full dot

  - Natural display

  - Algebraic input logic: Natural V.P.A.M.

  - Characters/lines: 16/1 + 10/1

  - Significant digits: 10 + 2

- Memory

  - Repeating function

  - Variable memory: 9

- Basic mathematics

  - Functions: 417

  - Scientific constants: 40

  - Unit conversions: 40

  - Bracket levels: 24

  - Fraction calculations

  - Angle dimensions deg/rad/grad

  - Conversions between deg/rad/grad

  - Coordinate conversion pol ÷ rec

  - Trigonometric functions sin/cos/tan/sin-1/cos-1/tan-1

  - Hyperbolic functions sinh/cosh/tanh/sinh-1/cosh-1/tanh-1

  - Powers, logarithms, input, 10^x, e^x

  - Mathematical functions √, x^2, x^-1, 1/x, x!, xy, x1/y

  - Calculations based on N (hexadecimal/decimal/binary/octal)

  - Logical operators (and/or/etc.)

  - Technical notation ENG/ENG

  - Complex number calculations

  - Random number generator

  - Value table

  - Matrix calculations / vector calculations

  - Equation calculations

- Statistics

  - ∑x, ∑x^2 sum

  - Σx, σy, σx sum^2, σy^2, σxy

  - Standard deviations for grouped and ungrouped values

  - Regression analysis

  - Permutations (nPr) and combinations (nCr)

- Other

  - Difficult events

  - Auto power-off

  - Power source: Solar + battery

  - Battery type: 1 x LR-44

  - Dimensions (H x W x D mm): 11 x 77 x 162

  - Weight: 95 g