Casio fx-991CW Advanced Scientific Calculator

Описание: The Casio fx-991CW is an advanced scientific calculator, part of Casio's ClassWiz series, designed to support complex mathematical and scientific computations. Released in 2023, it serves as a successor to the fx-991EX, incorporating several enhancements to improve user experience and functionality.

*Display and Design*

**LCD Display**: Features a quadruple-graded LCD display that enhances visibility, making it easier to locate the cursor during expression input and modification.

**Key Design**: Equipped with circular, convex buttons that are appropriately spaced to minimize input errors. The button labels now include glyphic representations of their functions for intuitive use. citeturn0search0

**Protective Casing**: Comes with a hard plastic case featuring an etched edge surface to prevent slipping, ensuring a secure grip during use.

*Functionality and Features*

**Comprehensive Calculations**: Supports a wide range of calculations, including basic arithmetic, fractions, percentages, trigonometric functions, hyperbolic functions, logarithms, exponentials, and more.

**Advanced Mathematical Functions**: Offers capabilities for matrix and vector calculations, complex numbers, base-n calculations, equation solving (simultaneous and polynomial equations), and inequality calculations.

**Statistical Analysis**: Includes a list-based STAT-data editor, facilitating one-variable and two-variable statistics, regression analysis, and distribution calculations.

**MathBox Feature**: Introduces the MathBox function, enabling probability simulations such as coin tosses and dice rolls, enhancing learning through interactive experiences.

**Spreadsheet Function**: Incorporates a spreadsheet feature capable of handling up to five columns and 45 rows, useful for learning statistics and managing data efficiently.

**QR Code Integration**: Generates QR codes for equations input into the calculator, allowing users to visualize graphs and other graphics on smart devices by scanning the codes.
*Memory and Storage*

**Variable Storage**: Capable of storing and recalling up to nine variables (A, B, C, D, E, F, X, Y, M), which can contain integers, computations, and functions. These variables persist in the calculator's memory between sessions, ensuring continuity in calculations.

*Physical Specifications*

**Dimensions**: Measures 162 mm in length, 77 mm in width, and 10.7 mm in depth, making it a compact and portable device suitable for students and professionals.

**Weight**: Weighs approximately 95 grams, ensuring ease of transport and handling.

*Power Supply*

**Dual Power Source**: Operates on both solar and battery power, with solar power utilized when sufficient light is available and battery power (LR44) used in low-light conditions.

*Additional Features*

**Exam Compatibility**: Permitted for use in various examinations, including GCSE, AS, and A Level exams, adhering to standard regulations.

**Catalog Menu**: Provides a comprehensive catalog menu that displays categories of commands, functions, and symbols, aiding users in navigating the calculator's extensive features efficiently.

The Casio fx-991CW is a versatile and user-friendly scientific calculator, well-suited for advanced mathematical studies and professional applications, offering a blend of functionality, portability, and innovative features to enhance computational efficiency.