Casio FX-991ES
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
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
abExponential
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
