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I really need help with deriving an accurate rational expression from the general equation of a conic section. The calc graphs it inaccurately no matter how plainly I dish it out.

I have recently completed Trigmaster 83(tm) for the 83 and 83+. It is pretty useful, and contains:
-information on all six trig functions
-diagrams of how to derive trig functions
-equations for both right and oblique triangles(how to calculate sides or angles with known data)

Sorry about this, somehow the post transferred before I was finished writing it. The completed post, with the Trigmaster(tm)'s wonderful functionality, is immediately following.

I have recently completed Trigmaster 83(tm) for the 83 and 83+. It is pretty useful, and contains:
-information on all six trig functions
-diagrams of how to derive trig functions
-equations for both right and oblique triangles(how to
calculate sides or angles with known data)
-the basic trig laws(sines/cosines) and solvers
-relations (sine squared plus cosine squared=1 and the
like)
-conversions between radians, gradients, degrees
-and the circle angles (all major angles and their
vertices on the unit circle)

All this is contained in 7128 bytes of RAM for the program and a further 764 for the diagram.

Also newly encoded are the six trig functions with their first and second derivatives, which comes in handy in calculus.

hey. i saw your message in the posting page about a program you created. it souds very cool. have you posted it on the web yet? it's about trig funts. and some calculus.
please if you want to e-mail it to me, please do it. apolo_david@hotmail.com

I have been programming my TI-83+ for awhile now, and I'm a good way thru a couple major projects. When I get a Graph-Link, I'm going to upload a Beta version of them. Here's a preview:
======= ============================= =====
====AA-MATH: Algebra I and Geometry:= =====
===================================== =====
This prgm has many functions, including: Pythagorean Theorem, Quadratic Equation, and Solver for Interior and Exterior Angles (a MAJOR help on your geom. tests!). I am working on a Trig Calculator, that can determine Sine, Cosine and Tangent type ratios, which wouldn't be that hard, but I'm currently working on an "idiot-proof" version that doesn't require much work for the user. We'll see.

===================================== =====
====MATH TEAM CHAMPION=============== =====
===================================== =====
A nifty little multi-function prgm like AA, but geared toward high-school math teamers. This is still in development, but I think some features may be: Prime Number Finder, which is similar to the 89/92 isprime() function (who says they get all the cool stuff?)...also, it may include a solver for 3x+2y=110 type problems, where it'll give all possible answers and count how many there were. Other functions will be added, depending on what I need. Combined with AA, your 83+ will be one major math machine.

Will anybody download these or am I wasting my time? E-mail or reply here so I know.

I will definately download it. i will be very nice if u send that prgm in my e-mail. thanx.

e-mail: mrutunjaya@hotmail.com

I'm working on a quadratic formula program which will instantly solve, factor, whatever you want. I'm done with the math part itself but I'm trying to add a couple more features. The one problem I have left; I need someway to get the calculator to "goto 3" if either
________ ________
-B+ \/B^2-4AC -B- \/B^2-4AC
-------------- or -----------------
2A 2A
are irrational. If you know of a way to do this, please reply to this message and tell me. Thanks!

I guess, you need the information about the irrationality of the numbers, in order to know whether the equation is reduceable (factorable)?
If your answer is Yes, I might have a subroutine, you could use. It finds the fraction of the value given. The nice thing about it is, that it returns the fraction as:

X
----
Y

Thus you can multiply the input value with Y and you recive an integer. In case the program is not able to return a fraction, A will be 0 otherwise it is 1.
The program is relativly fast too. It needs about 1-2 seconds.
If you are interessted, mail me.

just say
:if (-b^2- 4 *A * C) < 0
:goto 3

I have been trying to build a program that would be able to calculate Pi the the nth digit, or a digit that is user-defined. I have been working on it for quite some time, and have only been able to get the consept down. What it would do is it would take a formula for calculating Pi (e.g. tan^-1(1)*4). Then I would break down the digits into automatically assigned strings. It would dispay it with the full screen. then it would delete the string so it could be re-used. I have been able to get most of the string assigning down, but my main question is that is there anyone out there who can breakdown the formula to be able to take chunks from the algorithm.

Anthony

what I ment was atan(1)4, if some got mixed up with the "tan^-1(1)4", I hope this helps.

Anthony

Hello, all math lovers!
Detach-head solutions is currently working on a multi purpose math application. It can do many things, like calculate any of the sides/angles in an triangle, and it can calculate the amount of days between two dates (just naming a few). It has not everything, but it has the best of everything! I would really like to hear your comments on what features it should have.

Thankyou!
Detach-head solutions

Goldmath's is completed now. I have just uploaded it... Have phun!

I am working on a very large math program that contains everything from a qadratic program that dislays all your work to a fully functional and searchable periodic table and I was wondering how to make it into a flash app?

Well, turning a Basic program into an flash app is kind of hard, you have to rewrite every single piece of basic-code to asm-code, and flash apps need to bee signed by Ti, before they can run on calculators, and that costs some money, I think...

TI has both free and for purchase APPS. I believe it would depend upon what kind of APP it is.

Michael Burch
mdsb75@hotmail.com/mdsb7580118@yahoo.com

i have just completed a geometry program that will solve for TONS of formulas and theorems. it was written in TI-83+ BASIC. if anyone is interested in this program then reply to this or email me. i dont have a link cable so i will have to send you just the code.

That'll be fine for me
Im at bear_den04@hotmail

can i please have a copy of the source? thanks a lot!

bhbwboeckel@hotmail.com