Paige

Tips for Math with the TI-89 Titanium
© 2006 July 24, for the TI-89 Titanium OS 3.10
Dr. Wm J. Larson, International School of Geneva, william.larson@ecolint.ch
Corrections welcome.


Operating System 2


Getting Started 2

The Green, Yellow & Purple Symbols 2
The Two Minus Keys 2
The Two Equals Signs 2
Exponents and Roots 2
Scientific Notation 2
Degrees & Radian Modes2
Exact and Approximate Modes 2
More Symbols & Functions 3
Parentheses 3
Lists, Matrices & Vectors 3
The Plus/Minus Sign 3
The F1 to F8 Keys 3
Clearing 3
Shortcuts 3
On Screen Syntax Help 3
If the screen is too dark or light 3
If the calculator is locked-up 4
To quickly move to the end of an expression 4
To reuse a previous entry 4
To highlight text 4To copy text 4
If you are lost 4
To change the number of digits displayed 4
The With key 4
Insert Mode 4
log x 4
Pi 4
order of operations 4

Graphing 5

Zoom 5
Friendly Windows 5
Trace 6
To change the center of the graph 6
To format a graph 6
To cancel a graph 6
Modes 6
To store a window setting 6
To depict an inequality 6
Parametric Graphs 6Polar Graphs 6
To find the Minima or Maxima of a function 7
Solving a system of two equations I.e. Finding the Intersections of Two Graphs 7
To find the x and y intercepts 7
Tables 7
Asymptotes 8
Piecewise-Defined Graph 8
Graphing a Real Function 9

Complex Numbers 9

Converting from Rectangular to Polar or Trigonometric Form 9
Solving with Complex Numbers 9Graphing a Complex Function 10
Converting from Rectangular to Polar Coordinates 10

Other Commands 10

The Solve & Zeros commands 10
Solving inequalities 11
Factoring and Expanding 11
Permutations and Combinations 11
Sequences and Series 11
Matrices 12
How to graph a Conic Equation 12
How to Simplify Rational Functions 13
To Solve a System of Equations with Solve( 13The Inverse 13
Linear Interpolation 14
Step functions 14
To Simplify Expressions 14
Binary, Hexadecimal & Decimal 14
To delete functions, lists, tables, etc. 14
Define 15

Programming 15


On Line Help 15


Error Messages 15

Error: Dimension 15
Reset All Memory 15

Calculus 16

On The Home Screen 16
Differentiation 16
Numerical Differentiation 16Integration 16
Limits 16
Finding Epsilon in the Limit Definition 16
Minima and Maxima 16
On The Graph Screen 17
Differentiation 17
Integration 17
Partial Fraction Decomposition 17
Minima, Maxima, Inflection Points, Tangent Lines & Arc Length 17
Convergence of a Sequence 17
Taylor Series Approximations 17
Riemann Sums 18
Differential Equations 18
Implicitdifferentiation 18





Operating System

Just as your PC can be upgraded to WinXP, your TI-89 can be upgraded to OS 3.10. In both cases overall you get a better experience.

To find your OS select TOOLS on the HOMESCREEN, select option A: ABOUT

To download OS 3.10 go to http://education.ti.com and navigate tohttp://education.ti.com/educationportal/sites/US/productDetail/us_os_89titanium.html.

Installing OS 3.10 will remove all data including preloaded Graphing Calculator Software Applications (Apps) for example Stats/List Editor.


Getting Started


The Blue, Green, Yellow & Grey Symbols

The blue 2nd key accesses the blue functions, e.g. 2nd π.

The green ( key accesses the green functions, e.g. ( Y=.

The gray alpha key accesses the gray functions, producinglower case letters, e.g. alpha A gives “a”.

The ( key, produces upper case letters, e.g. ( A produces “A”. However the TI-89 isn't case-sensitive, 'A' is treated just like 'a', even built-in commands that have capital letters in them can be typed in lowercase, e.g., 'cSolve' can be typed 'csolve'. It will change to 'cSolve' once you hit ENTER.

Alpha Lock: To key several lowercase letters, key...