| __Name__ | __Size__ | __Date__ | __Rating__ | __Description__ |

| **(Parent Dir)** | *folder* | | **Up to TI-89 BASIC Math Programs** |

| **absolutetrisolve.zip** | 1k | 04-04-11 | | **Absolute Trisolve v2.00** Trisolve is now officially completely remodeled and doctored. It is a function that will solve an entire triangle given three total sides or angles - just put zeroes for the values you don't know. I took off the extra baggage and made this into a function, which is useful for precalculus, geometry, and many other applications. |

| **arctan2.zip** | 1k | 06-06-15 | | **Arctan2** Arctan2 finds the angle associated with the x and y coordinates which the user is prompted for. The program does work for radians and degrees. |

| **atan2.zip** | 207k | 10-05-24 | | **4 quadrant ArcTangent / ArcoTangente en 4 cuadrantes** ENGLISH: This function returns the four quadrant inverse tangent (arctangent). TI-89, TI-92, TI-92 Plus, Voyage 200 and TI-89 Titanium compatible. ESPAÑOL: Esta función calcula la tangente inversa en cuatro cuadrantes (arcotangente). Compatible con TI-89, TI-92, TI-92 Plus, Voyage 200 y TI-89 Titanium. |

| **atrigga.zip** | 3k | 01-06-12 | | **Atrigga** Can solve any triangle; right triangles, scalene triangles, even ambiguous triangles. Also finds the area and perimeter and has a nice graphical representation. |

| **complexnumbersandtrig_new.zip** | 3k | 12-03-07 | | **Complex Numbers and Trig Pack (v2)** Has a set of programs that are well used in the honors algebra 2 class. Includes number coversion from polar to rectangular and viceversa, polar to rectangular functions and viceversa, complex number multiply or divide and conversions, and a front-end for demoivre's theorem. |

| **converte.zip** | 1k | 12-01-06 | | **CONVERTe** The Program converts radian measure to degrees as a decimal and as degrees, minutes, and seconds. A measurement in decimal degrees is converted to pi radians, decimal radians, and degrees, minutes, seconds. Also a measurement in degrees, minutes, and seconds is converted to degrees as a decimal and as radians. |

| **dct.zip** | 126k | 08-02-17 | | **DCT Descrete Cosine Tansform** Discrete Cosine Transform The Programm promts the user to enter matrix size and values and then performs a cosine transformation. This is to simulate the process involved with MPEG2. There a DSP performes the colculation. The progi comes complete with c source code, from J. Daldosch. |

| **delta89.zip** | 1k | 03-03-14 | | **Delta: Triangle Solver** Delta: Triangle Solver calculates the measures of the angles and the lengths of the sides of a triangle using the laws of sine and cosines. |

| **fastrige.zip** | 13k | 12-01-02 | | **FASTRIGe** The Program quickly finds cos, sin, tan, cot, sec, and csc for degrees and radians in radical form, if the 89 can display it, and decimal form. |

| **functionstrig.zip** | 1k | 05-10-29 | | **Trig Functions Helper** This programs works by using the basic trig function y=a*trig(bx-c)+k, where "trig" can be sin, cos, tan, csc, sec or cot. After entering the requested values, it solves for: amplitude, period, scale, reflection, vertical stretch/shrink, horizontal stretch/shrink, phase shift and vertical shift. It also allows you to easily graph the equation. It's a very nice program, so at least check out the screenshots (please). |

| **identrig.zip** | 2k | 99-10-02 | | **Identrig v1.0** A program which displays all of the trig identities (Fundamental, Addition and Subtraction, Double Angle, and Half Angle.) |

| **invcircfunc.zip** | 1k | 01-03-25 | | **Inverse Circle Functions** A progam that creates the ArcSecant, ArcCosecant and ArcCotangent functions (also known as arc functions). |

| **lawcos.zip** | 2k | 02-09-30 | | **Law of Cosines Solver v1.0** This application will solve for the missing side or missing angle in a triangle, using the Law of Cosines, once given the proper known values. Featuring a very intuitive interface, this essentially bug-free app is a boon for anyone working with geometry. Weighing in at just under 800 bytes once on the calculator, this program won't eat up your previous RAM either. So, download and have at it! |

| **lcf.zip** | 1k | 00-03-20 | | **Law of Cosine** A simple program used to caculate sides and angles of triangles using the law of cosines. You know how to use the law, you know how to use the program. |

| **loc.zip** | 1k | 00-10-24 | | **Law of Cosine** A SSS and SAS triangle solver where you punch in the numbers and it gives you the answer. |

| **phyta.zip** | 27k | 01-03-11 | | **Phyta89 v0.2** This prgram is just a simple math program that will calculate the length of sides in a right triangle. This version is now free of bugs... I hope... |

| **prosolve.zip** | 3k | 00-04-11 | | **ProSolve 1.1** A BUG FIXED! Will solve a complete triangle (with area) from 3 pieces of information. Also shows equations used to solve the triangle! |

| **pyt89.zip** | 1k | 01-06-01 | | **Best Pythagorean Theorem Solver** An easy and quick way to do or check your work when solving for the sides of a triangle. A must for Geometry students! |

| **pythag89.zip** | 27k | 06-04-15 | | **Optimal Pythagorean Solvers** This solves for any variable in the Pythagorean Theorem. It's made in TI-Basic for all TI's; QBasic for IBM PC DOS; and z80 asm on the 83+ & 86. All TI-Basic version have been optimized extensively and tested for errors. |

| **pythagor2.zip** | 1k | 03-03-17 | | **pythagorean therom solver** have a quadratic equation you are dying to solve? well worry no more with this program. solves quadratic equatons for c and for a or b. no more worries curtisy of michael youssef. e-mail me about the file at killajoy6666@charter.net ! thanks |

| **pythagoreantheorem.zip** | 1k | 04-09-23 | | **Pythagorean Theorem** This program is the Pythagorean Theorem! EXTRA FEATURES! |

| **pythagor.zip** | 1k | 98-09-09 | | **Pythagorean Theorem v2.0** Pythagorean Theorem Programs |

| **pythat.zip** | 1k | 01-03-25 | | **Pythagorean Theorem** This is a program that you use to find the answer to X in the a^2+b^2=c^2 formula, VERY easy to use. |

| **pyth.zip** | 1k | 02-05-27 | | **Erik's Pythagorean Theorem** This is a very userfriendly program that will solve for a, b, or c. It is my first public program so I hope you like it! It is very nice so let me know if you download it (even if you hate it :-p) |

| **secdeg.zip** | 1k | 02-03-17 | | **Second degré** Voici un programme très simple qui calcule delta et donne les sol d'un polynôme de second degré . SPECIAL : inclu un raccourci clavier très pratique d'utilisation ... Il vous faut flib pour l'utiliser. |

| **solvepro.zip** | 3k | 00-02-28 | | **Triangle Solver PRO** Will solve a complete triangle (with area) from 3 pieces of information. Also shows equations used to solve the triangle! |

| **solvtrig.zip** | 150k | 11-05-21 | | **Solve Systems of Trig Equations ** This program is intended to solve systems of equations involving trig functions with 1 or 2 unknown angles, but is also an easy way to handle other types of equations, such as exponential or logarithmic equations or complex trig equations with one unknown. It uses the TI Solve function, but is easier to use since there is no variable list to enter. Angle domains can be entered simply by choosing quadrants from a menu. Restrictions for linear variables, such as x>0 and y>0 and y≤ 5, can be entered. Angles can be displayed in radians (in terms of pi when possible) or degrees. All entries can be edited. Solutions are copied to the Home screen and are stored under the variable names. Several examples are included. |

| **specialrighttriangles.zip** | 2k | 01-12-15 | | **Special Right Triangles** A guide to angles and lengths of the two special right triangles (45/45/90 & 30/60/90). |

| **supheron.zip** | 28k | 14-08-06 | | **Superficie triangulo por Herón** Esta aplicacion calcula la superfice por Herón introduciendo los tres lados de un triangulo. En caso de que la solucion no sea real nos devuelve un mensaje diciendo que "NO ES TRIANGULO", esto ocurre cuando la raíz es negativa |

| **tangentllgm.zip** | 7k | 02-04-08 | | **Tangent Line LGM** This program finds the equation of the tangent line to a function at a point. The user needs to enter a function (in terms of x) and the x coordinate of the point. The program returns the equation of the tangent line in exact mode. |

| **tan_line.zip** | 3k | 06-08-13 | | **Tangent Line Stuff** Finds line tangent to function at point; line tangent to a function passing through a certain point; line(s) tangent to two functions. Read the ReadMe. :) |

| **tanline.zip** | 2k | 02-01-01 | | **Tangent Line v1.0** This is a function to find tangent lines to a curve at a given x coordinate. It is very small and easy to use. Includes a text version of the code for those without graph-link. See readme for more details. |

| **tanpt.zip** | 1k | 00-10-01 | | **TangentPoint** Does tangent through a point not on the curve |

| **tn.zip** | 1k | 00-09-14 | | **SFAPC: Tangent and Normal line** Find the tangent & normal line for any function |

| **trfuncs.zip** | 1k | 99-02-28 | | **Cosecant, Secant, and Cotangent** Functions that find the secant, cosecant, or cotangent of a number. |

| **trgfun.zip** | 1k | 00-08-28 | | **Trig Functions** Add-On Functions fro Trig. These are Very useful, and make things faster. |

| **tri2.zip** | 3k | 00-07-14 | | **Triangle Solver** simple triangle solver |

| **tri89.zip** | 3k | 99-05-13 | | **Triangles89** Sides, angles, altitudes, medians, angle bisectors, area, and a drawing. |

| **triangle2.zip** | 6k | 02-05-27 | | **trianglemesures** Ce programme permet grâce à 3 données du triangle de retrouver les 3 autres si possible ( en fonction des données que vous entrez ). Il trace ensuite le triangle, sans le déformer, et en choisissant la meilleure fenêtre possible. Aucune erreur connue, très simple et pratique d'utilisation, il vous sera peut être utile pour vérifier vos calculs ou autres ... French version only, the english one will be disponible in a few days |

| **triangle89.zip** | 1k | 99-03-20 | | **Triangle Solver 89** Solves for all angles, sides and area of a triangle. |

| **trianglemesures.zip** | 6k | 02-03-17 | | **Triangle mesures** Ce programme retourne toutes les données du triangle a partir de qqs mesures . SPECIAL : un raccourci clavier très pratique . Il vous faut flib pour l'utiliser. This program returns all dimensions of a triangle when you enter some of these informations . SPECIAL : a link from "home" very useful. You need flib to run this ... sorry for my bad english |

| **triangleprgm.zip** | 1k | 03-05-14 | | **Triangle Program** This is designed to help immensly in trig. You tell it two sides of a triangle, and it tells you the area, and the measurements of the three angles |

| **triangleproperties2.zip** | 1k | 02-02-21 | | **Triangle Properties** This program takes any combination of sides and angles and gives the others and the area |

| **triangleproperties.zip** | 2k | 01-12-15 | | **Triangle Properties** Definitions, types, pictures of triangles, also includes Special Right Triangles. |

| **trianglesolver.zip** | 9k | 06-08-05 | | **Triangle Solver 3.0** Solves everything for triangles. Input three points and get equations for medians, perpendicular bisectors, altitudes, and angle bisectors; also centroid, circumcenter, orthocenter, incenter, and Euler line; also the area and perimeter of course. Input any three sides or angles and get the type of input (AAS, SAS, etc), the other three sides/angles, the lengths of the medianns, etc; you can see a graph of the triangle and rotate it around. There's more, but I think you get the idea. |

| **triangle.zip** | 1k | 98-10-03 | | **Triangle Solver** Solves for all sides and angles in a triangle given any 3 pieces of information. |

| **trig2.zip** | 1k | 99-05-26 | | **Trigonometry v1.0** This program displays Trigonometric functions, inverses, and laws. |

| **trig3.zip** | 2k | 99-11-19 | | **Trig Functions** More Trig Functions |

| **trig4.zip** | 12k | 00-08-29 | | **Trig Tools** This program tells you everything you wanted to know about trig!!! |

| **trig89.zip** | 2k | 03-12-20 | | **Trigonometry** A quick reference for trigonometry. It includes trigonometric definitions, common angle coordinates, common angle conversions to radians, trigonometric identities and trigonometric formulas. |

| **trig_autosolve.zip** | 18k | 03-03-30 | | **Triangle AutoSolver v2.0** Automatically decides which formulas should be applied to solve a triangle using the information given. |

| **trigcalculator.zip** | 2k | 04-03-27 | | **Easy Trigonometry Solver** This program allows you to easily solve any triangle, given one side and two other pieces of information. Has an easy-to-use interface and supports two-solution triangles. This program can also graph the triangles to incredible accuracy. This is the TI-89 version of the program used in Spearfish High School. |

| **trigformulae.zip** | 1k | 04-07-15 | | **Trigonometry Formulae** A really complete, well organized compilation of virtually all the trig formulae covered in pre-calc. It contains the fundamental identities, Pythagorean identities, sum/difference formulae, sum-to-product and product-to-sum formulae, the odd/even functions, the law of sines, the law of cosines, as well as the half- , double- , and triple-angle formulae. It also includes a list of common values and less common values, such as 30, 45, 15, 18, and 54 degrees. It 'pretty prints' the formulae whenever possible. Really quite nice. |

| **trigfunc2.zip** | 3k | 00-03-16 | | **Trig Functions** This program solve for the other 5 trig functions, when one function is entered with the quadrant number. |

| **trigfunctions.zip** | 2k | 01-12-16 | | **Trig Functions** It's a combo of sine cosine and tangent fuctions |

| **trigfunc.zip** | 2k | 00-02-12 | | **Trigfunc v1.0** Trigonometric Function Solver v1.0 This program allows the user to imput data and define preferences to receive answers to either the regular or inverse of all trig functions. |

| **triggraphing.zip** | 1k | 02-08-28 | | **Trig Graphing** This program, given the (a,b,-c,d) coefficients from an equation, will calculate the amplitude, period, phase shift, interval, and vertical translation of a trig function. Also provides easy access to graphing the function once it has solve the beforementioned values and will store the vars for further analysis. Very easy to use. |

| **trig.heron.zip** | 1k | 04-05-20 | | **Heron's Formula (shows work)** This program is like most other Heron's formula programs, except it shows the steps needed to carry out the problem |

| **trigo2.zip** | 3k | 00-12-23 | | **Trigonometry** A product of many bored hours in Trig. A set of notes with many things from values to double angle identities. |

| **trigonometric_identities_.zip** | 1k | 03-11-22 | | **Trigonometric Identities and Formulas** Includes definition of the six trigonometric functions, reciprocal identities, tangent and cotangent identities, pythagorean identities, cofuction identities, reduction formulas, sum and Difference formulas, double-Angle formulas,power-Reducing formulas, sum to Product formulas, and product to Sum formulas. |

| **trigon.zip** | 2k | 99-05-24 | | **Trigonometry v2.0** This is a update of trigon159.zip (Trigonometry v1.59) |

| **trigo.zip** | 6k | 00-04-13 | | **Trigo** This program displays the trigonometry's formulas in a very useful tabular form. Docs/Prog are in french and english. |

| **trigplus2.zip** | 1k | 11-06-15 | | **Triangle Solver** Given three of any elements in the triangle (choosing from the 3 angles and the 3 sides), calculate the rest of the sides & angle measures, the lengths of the altitudes, the lengths of the medians, the lengths of the angle bisectors, the lengths of the inradii and circumradii, the area, and the the perimeter. Works for SSA (two triangles) and even if there are no solutions, the program will continue to run so that it gives at least partial results for the benefit of the user. Note: It still indicates, though, if there truly are no real solutions. |

| **trigplus.zip** | 33k | 02-05-11 | | **TrigPlus: Triangle Solver** TrigPlus is a triangle sovler for oblique and right triangles. It gives data on specian geometric segments (median, altitude, angle bisector), area, and in/circ-scribed circles. It can handle all cases including the ambiguous case. Its checks for possible triangles and can draw to scale the triangle itself. All this in a nice easy to use interface. |

| **trigsolve.zip** | 1k | 02-08-28 | | **Trig Solve** Trig Solve allows the user to enter in a known trig value and the quad that it's in and have the calculator figure out the remaining five trig values. Depending what quad you choose, it accounts for positive and negative. Answers are displayed in a matrix in exact and approximate values. Is a very fast way to solve trig values accurately! |

| **trigsolv.zip** | 2k | 00-03-02 | | **Trigonometric Function Solver and Grapher v1.0** This program, while similar to trigfunc I wrote earlier, graphs the angle the user inputs on the unit circle and gives the coordinates of the point of intersection on the circle. It also solves the triangle formed by the angle, giving the values of all the sides and the remaining angles. Then the user can continue to show the all the trig values for that angle. It will display all trig functions, including the inverse. Any angle works for this program (in degrees or radians). |

| **trigstuff.zip** | 1k | 09-09-06 | | **SSS, SAS, AAS, 3 points Triangle Solver** solves the information regarding the triangle by entering 3 side values, 2 sides + 1 angle, 1 side + 2 angles, or 3 point values |

| **trigtext.zip** | 1k | 11-09-07 | | **Trigonometric Identities** This is a convenient study guide enumerating several useful trigonometric identities for use in multiple levels of math. Some identities are so advanced, even the TI-89 does not have them pre-installed. |

| **trig.zip** | 13k | 00-01-02 | | **Trig Functions v2.0** A update to the popular Trig Functions V1.1Beta, now with NEW Law of Sine and Cosine Menus, Herons Law, Compatability with AMS V2.03 (There were some bugs with the old version), rewritten code, and general updates to the whole program menus. Also I have included some new documentation to help you get started. |

| **tripgrm1.zip** | 1k | 03-03-28 | | **30-60-90 Right Triangle ** This quick and easy to use program calculates both the longer side and hypotenuse of a 30-60-90 right triangle. Please E-Mail me with suggestions or comments. This is my first program and hope to write more with user feedback. |

| **triples.zip** | 1k | 02-09-27 | | **Pythagorean Triples** This program lists all pythagorean triples |

| **trislv.zip** | 3k | 00-12-17 | | **Triangle Solver** This is a simple triangle solver. Several bugs have been fixed in this version. |

| **trisolve25.zip** | 2k | 04-10-20 | | **TriSolve v.2.5** TriSolve can tell you every detail about a triangle if you enter the values for the 3 sides. It can calculate: angles, medians, bisectors, altitudes, inscribed circle area, radius and circumference. The only thing it can't do is circumscribed circles (because I'm too lazy to look up the formulas:) GREAT FOR TRIG! |

| **trisolve2.zip** | 1k | 00-06-06 | | **Triangle Solver** Solves for the sides and angles of any triangle. See readme. |

| **trisolve3.zip** | 2k | 00-08-28 | | **Triangle Sover** Give this program any three sides or angles and it will find the other ones and the area of the triangle! It's that simple! It will even give both possibilities, if they exist, when given two sides and an angle opposite on of them! |

| **trisolver.zip** | 1k | 99-12-25 | | **TriSolve** Given 3 parts of a triangle, solves for the other 3 and calculates area, includes ambiguous case. |

| **trisolve.zip** | 5k | 10-07-23 | | **TriSolve v1.7** 10 years of bug-free operation! Using the laws of sine and cosine this program will solve the area and remaining angles and sides of a triangle when you give it any three (except 3 angles). If the triangle has two possible solutions (some SSA triangles) it gives you both also. Angles are shown in normal degrees and degrees/minutes/seconds. Version 1.7 has a brand new bug fix and smaller code. |

| **triworks.zip** | 1k | 01-03-14 | | **TriWorks** This is a simple program that allows you to use the Triangle Inequalities Theorem to solve whether a written triangle would work in the real world, by using the lengths of the sides. For use in Geometry. |

| **trix.zip** | 3k | 02-11-29 | | **TriSolve v2.00 & TriK v1.99** Tri Solve 2.00 will solve for ANY triangle you input. You have the choice of solving SSS, SAS, SSA, AAS, and ASA triangles. It will solve for multiple triangles (i.e. in SSA and SAS triangles.), and use the angles and sides you provide to solve for the missing angles using the Law of SInes and the Law of Cosines. All angle calculations are in degrees. This is a great program, and it saves a lot of time. TriK 1.99 uses the same basic code as TriSolve, and solves for the area of triangles using Hero's Formula. All of the above applies, including solving for multiple triangles. |

| **tri.zip** | 1k | 05-01-28 | | **Triangulos** Este programa resuelve triangulos rectangulos sabiendo solo un angulo y un cateto o la hipotenusa e incluso sin saber el angulo |

| **tsimplfy.zip** | 5k | 02-05-27 | | **Trig Simplify ** Converts messy trig expressions to much cleaner ones containing cosecant, secant, and cotangent. Only program of its kind in the archives and an excellent help in trig, calculus I, and calculus II. |

| **tsolvecircle.zip** | 7k | 06-01-28 | | **Tsolve Circle v1.01** It solves almost all the trigonometrical equations and display the solutions on a circle. Il résout presque toutes les équations trigonométriques et affiche les solutions sur un cercle trigo (!!!). |

| **tsolveq.zip** | 3k | 05-12-10 | | **Trigonometric Equation Solver** This program is a trimmed down version of Tsolvgrf(). The graphing part of the program has been removed. It includes the latest upgrade to Tsolvgrf(), which speeds up the process of displaying results. The program finds all solutions, within a chosen domain, of a trigonometric equation. Results are shown first in radians, in exact form as a multiple of pi, when possible, rather than decimal form. They can also be displayed in degrees. The default domain is 0--2pi, but it can be changed. The equation can be edited, either before or after solving. The solutions are copied to the home screen. |

| **tsolve.zip** | 7k | 03-05-18 | | **Trigonometric Equality and Inequality Solver v. 2.00** This function allows the user to solve an equality or inequality with a single variable in a limited domain. This allows the solution to be free of the @n symbol so it is much easier to read and comprehend than the solution the built-in solve function would give. While the domain of the solve function can also be limited, it will still return some solutions with @n in it and this function eliminates that entirely. -- The function should now work properly with any and all approximations, along with fixing the problem of not returning all correct solutions of certain trig functions in AMS 2.08 |

| **tsolvgrf.zip** | 4k | 05-12-10 | | **Trigonometric Equation Solver and Grapher** This update of Tsolvgrf() speeds up the process of displaying results. The program finds all solutions, within a chosen domain, of a trigonometric equation. As an option, the function can be graphed to display the solutions. Results are shown first in radians, in exact form as a multiple of pi, when possible, rather than decimal form. They can also be displayed in degrees. The default domain is 0--2pi, but it can be changed. The equation can be edited, either before or after solving. The ranges for the graph can be changed or zoomed. The solutions are copied to the home screen. |

| **u_circle.zip** | 1k | 00-05-09 | | **Unit Circle v2.1** Same as before but this time with a loading program to load it for you. Just run the file..."runthis" and the setup is complete. Aaron Ligon |

| **unitcircle.zip** | 11k | 05-07-28 | | **Graphical Unit Circle** Displays a graphical unit circle with the degree and radian angle measure when a degree or radian measure angle is given |

| **unitcirc.zip** | 1k | 05-05-20 | | **Unit Circle** Best unit circle program available. Prompts for degrees or radians, user configurable angle increments. Trace along the circle and see sine and cosine change with the angle. Key in any angle and get sine and cosine for that angle. Very simple program and easy to use. Not garbaged up with useless and buggy extras. Very slick. |

| **utriangle.zip** | 3k | 05-12-17 | | **Ultimate Triangle Solver** This is a program with graphical interface for solving law of cosines and law of sines. |