Calc89 CAS Graphing Calculator

The CAS graphing calculator intended for use with TI-89 Titanium or TI-84. Exact answers for solve, factor, derivatives and integrals, plus scan a problem to set it up.

Calc89, the CAS Graphing Calculator
The Computer Algebra System (CAS) graphing calculator lets you solve equations exactly, factor and expand, calculate symbolic derivatives and integrals, and graph everything, on a keypad with 2nd, ◆ and alpha layers.

Exact Answers with a Real CAS
Get the exact result your teacher expects: fractions, roots and π stay exact, and one key gives the decimal when you need it.
• solve, cSolve, zeros and nSolve for equations, inequalities and systems
• factor, expand, partial fractions, common denominators
• Derivatives with d, integrals with ∫, limits, sums Σ and products Π
• Taylor polynomials and differential equations with deSolve
• The with operator: evaluate at a point or restrict a solution in one line
• Define your own functions and store values in variables
• Symbolic matrices and lists with letters: det, inverse, rref, eigenvalues
• Units: convert meters to feet or newtons to pounds right on the home line

Built for Android: No ROM Needed
• No ROM dump and no emulator setup: install and start calculating instantly.
• Uses the full calculation power of your phone for fast CAS results.
• High-resolution screen with crisp math and smooth navigation.

Scan a Problem
Why type when you can scan? Point your camera at a worksheet, a textbook page or a handwritten equation. The scanner reads the math and puts it on the calculator, ready for ENTER.
• Equations, derivatives, integrals and limits land on the home line in CAS syntax
• Data tables go straight into the list editor
• Functions go into Y= and the window adjusts to them
Review the setup, tap Insert, and you are ready to solve.

Graph and Analyze
Graph functions, parametric, polar and sequence equations.
• Use your stored variables and CAS results directly in Y=
• Find zeros, minima, maxima and intersections on the graph, then see the exact value next to the decimal
• Draw tangent lines with their equation
• Trace, zoom and explore the table of values

Every Graphing Calculator Tool
All the scientific calculator, statistics and finance tools of a graphing calculator are built in.
• Every regression from linear to logistic, with stat plots
• Normal, binomial, Poisson, t and chi-square distributions
• Hypothesis tests and confidence intervals as clean forms
• Finance solver for TVM, polynomial root finder and system solver
• Programs in classic calculator BASIC

Your Personal Tutor
Stuck on the keys? Ask by text or voice. Get step-by-step guidance with the real keys as tappable chips that open the exact menu you need. Learn how to use your TI 89 calculator for homework, tests and exams.

Natural Math Display
Math looks like real math: stacked fractions, real roots, clean exponents. Pick one of eight themes, browse a searchable catalog with an example for every CAS command, and share your screen as an image.

Who Is It For?
High school and college students in algebra, precalculus, AP Calculus, physics and statistics. Ideal for anyone using a TI 89 or TI-Nspire in class, or looking for an advanced symbolic scientific calculator on their phone.

Terms of Service:
https://fredinax.com/terms/

TI-89 Titanium and TI-84 are registered trademarks of Texas Instruments Incorporated. Calc89 is an independent app, not affiliated with or endorsed by Texas Instruments.

Recent changes:
CAS Graphing calculator intended for use with TI-89. Exact math with our integrated computer algebra system (CAS) core.