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FX-991ES

fx991es

Features overview

  • Dot matrix display
  • Natural textbook display
  • 403 functions
  • Solution of equations
  • 20 pairs of values for metric conversion
  • Calculation with complex numbers
  • CALC key (temporary formula memory)
  • 40 physical constants
  • Matrix/vector calculation
  • Numerical integral & differential calculus
  • Two-way power

Functions & general information

General information:

  • 403 functions and 40 scientific constants
  • Display: Natural Textbook Display, 31 x 96 dot matrix
  • Power supply: solar powered with an auxiliary battery
  • with a hard case
  • Dimensions (H x W x D): 12.7 x 161.0 x 80.0 mm

Functions:

  • Repeat function
  • 24 levels of brackets
  • Variable memories (6)
  • STO/RCL keys
  • Scientific functions:
  • Trigonometric and inverse trigonometric functions
  • Hyperbolic and inverse hyperbolic functions
  • Exponential functions 10x, ex
  • Inverse function x-1
  • Power and root functions x?, ?, x2, xy
  • Logarithm functions (log, ln)
  • Combinatoric and permutations
  • Random number generator
  • Converts between polar coordinates and rectangular coordinates
  • Calculates with fractions (two modes)
  • Converts between sexagesimal and decimal
  • Calculates in gradian, degree and radian measure
  • ? key, e key and % key
  • SCI/FIX
  • Statistics:
  • Lists of based statistics
  • Statistics with a variable
  • standard deviation
  • Statistics with two variables
  • Linear
  • Exponential
  • abExponential
  • Logarithmic
  • Power
  • Inverse
  • Quadratic
  • Solve/Calc
  • Numeric integration
  • Numeric differentiation
  • ?()-function
  • calculates with complex numbers
  • a+bi /r??
  • Calculations on the basis of n
  • Logical calculations
  • Equations
  • Linear systems of equations
  • Polynomial equations
  • Linear systems of equations
  • Polynomial equations
  • Matrix
  • Determinants
  • Inverse matrix
  • Vector
  • internal product
  • external product
  • physical constants
  • metric conversion
  • Normal entry
  • Fractions
  • Roots
  • Powers
  • Parentheses
  • Amounts
  • Numeric differentiation/integration
  • Totals
  • Non-natural input (such as the MS models)
  • Output in ? -form
  • Output in ?-form
  • Functions table

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