ClassWiz fx-991EX Scientific Calculator

ClassWiz fx-991EX Scientific Calculator Online

A full-featured recreation of the world's most popular scientific calculator. This ClassWiz fx-991EX simulator includes Natural Textbook Display (MathIO), all major scientific functions, and multiple calculation modes. 100% free, runs entirely in your browser.

Features

• Natural Textbook Display with MathIO/LineIO toggle
• Trigonometry: sin, cos, tan and inverses, hyperbolic (sinh, cosh, tanh)
• Logarithmic: log, ln, 10^x, e^x
• Powers and roots: x squared, x cubed, nth power, square root, cube root, nth root
• Statistics: 1-variable and 2-variable with regression, frequency tables
• Equation solver: quadratic, cubic, 2x2 and 3x3 simultaneous equations
• Matrix operations up to 4x4: determinant, inverse, transpose, arithmetic
• Complex numbers in rectangular (a+bi) and polar (r angle theta) forms
• Number base conversions: DEC, HEX, OCT, BIN
• Spreadsheet mode with formula evaluation
• DEG/RAD/GRAD angle modes
• Fractions, percentages, constants (pi, e), ANS memory
• Keyboard support for fast input

How to Use

1. Select a mode using the MODE key: Calculate, Statistics, Equation, Matrix, Complex, Base-N, Spreadsheet, or Table.
2. Enter expressions using the on-screen buttons or your keyboard.
3. Press SHIFT (yellow) to access secondary functions like inverse trig and hyperbolic functions.
4. Press ALPHA (red) to access stored variables and constants.
5. Use the EXE key to evaluate. Results display in natural textbook format.
6. Toggle between MathIO and LineIO display in SETUP for different output formats.
7. Switch between DEG, RAD, and GRAD angle modes as needed.