Is my Casio fx-991EX genuine or a replica? : r/calculators

Casio FX-82MS Calculator 2nd Edition Functional 10+2 Digit Scientific Calculator

cos(1.57079632) is a bit of a torture test. : r/calculators

The ClassWiz features a high-resolution display - making it easier to view numerical formulas and symbols. The ClassWiz makes it possible to display on the screen twice the number of characters in normal size and six times the number in small size compared with previous models. A high-performance processor and twice the memory of previous models ensure speedy operation and superior computational power.

Casio Fx-991ex ClassWiz Scientific Calculator, LCD Display 552 Functions - Black

Casio FX-82MS Calculator 2nd Edition Functional 10+2 Digit Scientific Calculator

How do calculators work? - Explain that Stuff

Inside of a fake casio fx-991EX CLASSWIZ scientific calculator, teardown later : r/calculators

Soon to be the ultimate sewing calculator… : r/calculators

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CASIO FX-991ES Plus Functional Scientific 10+2Digit Calculator Student Engineer

fx-991EX, ClassWiz, Non programmable, scientific calculator

Is my Casio fx-991EX genuine or a replica? : r/calculators

FitSand Hard Case Compatible for Casio FX-991ES Plus Scientific Calculator : Office Products