Casio Fx-991ES Plus

KEY FEATURES

General information:

• 417 functions
• Display: Natural Textbook Display, Natural V.P.A.M.
• Power supply: solar powered with an auxiliary battery
• with a hard case
• Dimensions (H x W x D): 162,0 x 80,0 x 11,1 mm
• Weight: 95g

Functions:

• NEW: New fraction input mode
• NEW: Improved equation mode
• NEW: Random integers
• 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.
• π key, e key and % key
• SCI/FIX
• Statistics:
• Lists of based statistics
• Statistics with a variable
• standard deviation
• Statistics with two variables
• Linear
• Exponential
• Logarithmic
• Power
• Inverse
• Quadratic
• Solve/Calc
• Numeric integration
• Numeric differentiation
• ∑ ()-function
• calculates with complex numbers.
• a+bi /r∠θ
• 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 π-form
• Functions table

• FX 991ES-PLUS, Scientific Calculator
• Instruction