Restored Texas Instruments TI-89 Titanium Graphing Calculator (Refurbished)

Refurbished Texas Instruments TI-89 titanium graphing calculator packaging may differ. Includes battery cover and USB only. The TI-89 Titanium lets you perform basic math, algebra, calculus, graphs, matrices, and statistical functions creating animations, graphing 3-D rotations, and plotting contours. Graphing functions include basic function graphing, parametric graphing, polar graphing, sequence graphing, 3-D graphing, and differential-equation graphing. Additionally, the TI-89 Titanium includes symbolic manipulation, constants, and measurement units, statistics and data plots, a numeric solver, a text editor, programming capabilities, tables, a split-screen function, variable management, and the ability to link to other Calculators or a computer. The TI-89 Titanium's flash technology allows upgrading to future software versions without having to continually invest in new calculators.

• 188 KB RAM and 2.7 MB flash memory for speed
• Plenty of storage for functions, programs, data
• Large 100 x 160-pixel display for split-screen views
• USB on-the-go technology for file sharing with other calculators and connecting with PCs
• Matrix operations include inverse, determinant, transpose, augment, elementary row operations, and reduced row echelon form; matrix elements can be real or complex and numeric or symbolic