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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
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