Getting Started:
Make math and science easier (and more fun) with free graphing calculator programs and games from calculatorti.com. You can make the process of transfering the application to your calculator sweet and simple with Texas Instrument's handy TI connect software. Install it on your computer and grab your GraphLink Connection cable (USB cable) to plug in your calculator. Then you can start downloading any of our programs and games (Wow! There's a lot!) from our libraries to transfer and install them to your calculator. Have fun!Title:  Brief Desc.  Brief Description:  Req.  Requirements:  Category: 

Definite Integrals  TI89 graphing calculator program for solving definite integrals. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Converting 3D Functions  TI89 graphing calculator program for converting 3D functions. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Area and Perimeter of Geometric Shapes  TI89 graphing calculator program for calculating area and perimeter of geometric shapes. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Algebra and Geometry: Circles, Spheres and Triangles  TI84 Plus and TI83 Plus graphing calculator Algebra and geometry program, solves problems with circles, squares and triangles. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Solving Geometry Equations  TI89 graphing calculator program for solving geometry equations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Factoring  Multiplying Monomials  Prime Factorization  TI84 Plus and TI83 Plus graphing calculator program for factoring and multiplying polynomials, trinomials, and cubic functions. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Algebra Notes: Final Exam  TI84 Plus and TI83 Plus graphing calculator Program containing common final exam notes for most algebra courses. Includes trig equations, systems of equations and more. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Heron's Formula: Area of a Triangle  TI89 graphing calculator program for finding the area of a triangle using Heron's formula. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Learning and Recognizing Basic Functions  TI84 Plus and TI83 Plus graphing calculator program which helps students learn and recognize basic and common functions. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Centroid Program  TI89 graphing calculator program for calculating the centroid of a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

The Method of Least Squares  TI89 graphing calculator program for calculating the method of least squares. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Zeros of a Function  TI84 Plus and TI83 Plus graphing calculator program. Estimates the zeros of a function. Shows iterations. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Algebra Program: 32 Features  TI84 Plus and TI83 Plus graphing calculator Program includes 32 algebra functions: Roots of equations, simplifyed radicals, factors, logarithms, prime factorization and more. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Trapezoidal Rule  TI84 Plus and TI83 Plus graphing calculator program for approximating the region under the graph of a function using the trapezoidal rule. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Triangle Solver Advanced  TI89 graphing calculator program for solving advanced properties of triangles including, medians, perpendicular bisectors, altitudes, angle bisectors, centroid, circumcenter, orthocenter, incenter and Euler line 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Trigonometry ] 

TI89 Geometry Program  TI89 graphing calculator program for solving many common geometry problems. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Area Under Curve: Monte Carlo Method  TI84 Plus and TI83 Plus graphing calculator program. Calculates the area under a curve using the Monte Carlo method. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Slope intercept line calculator  TI89 graphing calculator program for calculating slope and x and y intercepts. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Multivariable Function Discriminant  TI89 graphing calculator program, calculates the discriminant of a multivariable function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Growth Decay Equation  TI89 graphing calculator program for solving variables in the growth/decay equation. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Equation Form Converter  TI84 Plus and TI83 Plus graphing calculator program for converting equations between standard form, point slope form, and slope intercept form 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Arc Length of a Function: Integration  TI84 Plus and TI83 Plus graphing calculator program. Calculates the arc length of a function by integration. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Triangle Formulas  TI89 graphing calculator program, determines which formula should be used to solve a given triangle. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Trigonometry ] 

Distance Between 2 Points  TI89 graphing calculator program for calculating the distance between 2 points. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Circle Area and Radius: 3 Points  TI89 graphing calculator program for calculating the area and radius of a circle. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Algebra 2 Geometry  TI89 graphing calculator algebra and geometry program. Completing the square, prime number functions, temperature converter and more. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Polynomial Division: Long and Short  TI84 Plus and TI83 Plus graphing calculator program for short and long division of polynomials. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Wallis Product  TI84 Plus and TI83 Plus graphing calculator program. Calculates the Wallis product of a function. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Area of a Convex Hull  TI89 graphing calculator program for calculating the area of a convex hull. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Integration Sums: Area Under a Curve  TI84 Plus and TI83 Plus graphing calculator program. Calculates integration sums used for approximating area under a curve. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Area Under the Curve of a Function: Monte Carlo Method  TI84 Plus and TI83 Plus graphing calculator program for finding the area under the curve of a function. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Pyramids: Ratios Between the Base, Height, Slant Height, Edge and Diagonal  TI89 graphing calculator program for calculating the ratios between the base, height, slant height, edge and diagonal of a pyramid. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Riemann Sums and Definite Integral of a Function  TI84 Plus and TI83 Plus graphing calculator program for calculating Riemann sums and the definite integral of a function. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Graphing Piecewise Functions  TI89 graphing calculator program for graphing piecewise functions. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Graphing ] 

HalfLife Decay Formula  TI89 graphing calculator half life decay formula program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Graphing Logarithms  TI84 Plus and TI83 Plus graphing calculator program for graphing logorithms. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Factor or Solve 2nd Degree Polynomials  TI84 Plus and TI83 Plus graphing calculator program for factoring or solving 2nd degree polynomials. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

One Price Rule  TI89 graphing calculator program for calculating the One Price Rule. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ BusinessFinance ] 

Binomial Expansion: Pascal's Triangle  TI84 Plus and TI83 Plus graphing calculator program will expand any binomial to the 336th degree and find any row pascal's triangle within the ... 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

GDP Growth Rate  TI89 graphing calculator program for calculating GDP growth rate. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ BusinessFinance ] 

Graphing Rectangle Approximation Methods  TI84 Plus and TI83 Plus graphing calculator program for Graphing rectangle approximation methods. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Root Finder: Newton's Method  TI84 Plus and TI83 Plus graphing calculator program. Finds the roots or zeros of a function using Newton's method. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Curvature and Tangent Vector Program  TI89 graphing calculator program for calculating the curvature and tangent vector of a parametric function to a given point. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Graphing Vector Fields  TI89 graphing calculator program for graphing vector fields. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Graphing ] 

Binomial Probability  TI89 graphing calculator program for calculating binomial probability. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Rectangle Approximations  TI89 graphing calculator program, calculates rectangle area approximations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Complex Roots of Complex Numbers  TI84 Plus and TI83 Plus graphing calculator program for calculating complex roots of complex numbers. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Equation Points of Intersection  TI89 graphing calculator program for finding the points of intersection of two linear equations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Integral Area Approximation  TI84 Plus and TI83 Plus graphing calculator program for calculating integral area approximation. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Partial Derivatives  Gradient  TI89 graphing calculator program, finds the partial derivatives or gradient of a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Laplace Transform  Bilateral  TI89 graphing calculator program, calculates bilateral Laplace transform 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Complex Analysis  TI89 graphing calculator complex analysis program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Differential Equations: Euler's Method  TI84 Plus and TI83 Plus graphing calculator program for solving differential equations using Euler's method. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Gaussian Curve  Normal Distribution  TI89 graphing calculator program for calculating the Gaussian curve or normal distribution. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

The Euler Method: Solving Differential Equations  TI84 Plus and TI83 Plus graphing calculator program uses the Euler method approximate the solutions of firstorder differential equations. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Hyperbolic Functions  TI89 graphing calculator program for exploring hyperbolic functions. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Regression  TI89 graphing calculator program for calculating the best regression. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Simplify Square Roots  TI84 Plus and TI83 Plus graphing calculator program for simplifying square roots. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Derivative Rules  TI84 Plus and TI83 Plus graphing calculator program contains all basic calculus derivative rules. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Euler's Function  TI89 graphing calculator Euler's function program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Graphing Angles  TI89 graphing calculator program for graphing angles. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Integrals: Rectangle Approximation Methods and Trapezoid Method  TI84 Plus and TI83 Plus graphing calculator program. Estimates the integral of a function using the rectangle and trapezoid methods. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Centroid of Two Functions  TI84 Plus and TI83 Plus graphing calculator program for the centroid of two functions. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Save Equations  TI89 graphing calculator program for solving previously saved equations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Integrals and The Fundamental Theorem of Calculus  TI84 Plus and TI83 Plus graphing calculator program for finding integrals and calculating the fundamental theorem of calculus. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Modular Arithmetic  Modular Arithmetic program for TI83 Plus and TI84 Plus Graphing Calculators 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Derivatives and Zeros  TI89 graphing calculator program for calculating the first and second derivatives of a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Partial Fraction and Proper Fractions  TI84 Plus and TI83 Plus graphing calculator program for dividing a proper fraction into it's partial fraction. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Solve Any Equation  TI84 Plus and TI83 Plus graphing calculator program for solving any equation. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Sorting Data: Lists, Matrices and Strings  TI89 graphing calculator program for sorting statistical data. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Properties of a Circle: Radius, Diameter, Circumference, and Area  TI89 graphing calculator program for calculating the radius, diameter, circumference, and area of a circle. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Recursive Functions  TI84 Plus and TI83 Plus graphing calculator program for evaluating recursive functions. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Common Calculus Methods and Functions  TI89 graphing calculator program for finding zeros in a function, interpolation, and integration using several different methods. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Bisection Method Function Solver  TI89 graphing calculator program for solving functions with the bisection method. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Equation of an Antiderivative  TI84 Plus and TI83 Plus graphing calculator program. Finds the equation of an antiderivative. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Logarithms: Convert, Evaluate and Graphing  TI84 Plus and TI83 Plus graphing calculator program for converting, calculating ang graphing logs. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Step by Step Algebra Program  TI84 Plus and TI83 Plus graphing calculator program shows step by step solutions to linear equations, logarithms, exponents, functions, trigonometry, domain and range problems. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Price Index  TI89 graphing calculator program for calculating price index. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ BusinessFinance ] 

Statistical Inventory Methods  TI89 graphing calculator program for calculating statistical inventory methods. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Statistics ] 

Factor Trinomials & Whole Numbers; Multiply Binomials  TI84 Plus and TI83 Plus graphing calculator program for factoring polynomials and whole numbers and FOIL multiplication of binomials. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Center of Mass of a Solid  TI89 graphing calculator program, calculates the center of mass of a solid. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Solving Systems of Equations  TI84 Plus and TI83 Plus graphing calculator systems of equations program. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Integration by Parts  TI89 graphing calculator program for integration by parts. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Inverse Laplace Transformation  TI89 graphing calculator program for calculating Inverse Laplace Transformation of a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Triangles: Sine and Cosine  TI89 graphing calculator program, calculates angle degrees and length of the sides of a triangle using the laws of sine and cosine. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Trigonometry ] 

Numerical Integration and Errors  TI89 graphing calculator numerical integration program 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Trapezoidal Rule: Integral Approximation  TI89 graphing calculator program for calculating integral approximations using the trapezoidal rule. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Extrema: Maximum and Minimum  TI89 graphing calculator program, calculates extrema or maximum and minimum of a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Radical Approximation  TI84 Plus and TI83 Plus graphing calculator program for radical approximation. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Graphing Histograms  TI89 graphing calculator program for graphing histograms 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Graphing ] 

Linear Approximation of a Function: Tangent Line  TI89 graphing calculator program, calculates the linear approximation of a function. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Dirichlet Beta Function  TI89 graphing calculator Dirichlet Beta Function program. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Calculus: Slope Fields, Average Value, Riemann Sums, Line Analysis  TI84 Plus and TI83 Plus graphing calculator program for common calculus problems including slope fields, average value, Riemann sums and slope, distance and midpoint of ... 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Calculus ] 

Solve Parabolic Equations  TI89 graphing calculator program for solving parabolic equations. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Tangent Line Program  TI89 graphing calculator program, calculates 3 different tangent line properties. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Trigonometry ] 

Perfect Square  TI84 Plus and TI83 Plus graphing calculator program for determining if a polynomial is a perfect square. 
Requires the ti83 plus or a ti84 model.
(Click here for an explanation)

[ Programs ] [ ti83/ti84 ] [ Algebra ] 

Area of a Circle  TI89 graphing calculator program for calculating the area of a circle. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Geometry ] 

Parabola Solve  TI89 graphing calculator program for solving parabolas. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Algebra ] 

Biateral Laplace Transform  TI89 graphing calculator program for calculating Biateral Laplace Transform 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 

Simpson's Rule  Area Under a Curve  TI89 graphing calculator program, estimates area under a curve using Simpson's rule. 
Requires the ti89 calculator.
(Click here for an explanation)

[ Programs ] [ ti89 ] [ Calculus ] 