Casio fx-991ES PLUS Scientific Calculator – 417 Functions, Natural Textbook Display & Dual Power
The Casio fx-991ES PLUS is an advanced non-programmable scientific calculator featuring 417 functions, Natural Textbook Display, solar + battery power, and support for equations, matrices, vectors, complex numbers, calculus and statistics. It is designed for students, engineers and professionals who need comprehensive scientific calculation capabilities.
Specifications
Full description
The Casio fx-991ES PLUS combines advanced scientific functions with Casio's Natural Textbook Display, allowing mathematical expressions such as fractions, roots and equations to appear in a format similar to the way they're written in textbooks.
With 417 built-in functions, it supports everyday arithmetic as well as trigonometry, logarithms, differentiation and integration, equation solving, complex numbers, matrices, vectors, statistics, scientific constants and metric conversions
The calculator is non-programmable and non-graphing and uses a 10+2-digit dot-matrix LCD. Its two-way power system combines solar power with battery backup, and Casio specifies an approximate main battery life of three years under its standard usage conditions.