hey guys,


i've made a great program for calculus using basicbuilder
omnicalc, symbolic and prettyprint are required for it to run
please check it out!

Just tried it and it is outstanding!  Just one question.  How do you enter slope equations for slope fields I can't figure it out?

BTW, I used your program to calculate pi and it was able to find: 3.141587076 I think that is a pretty accurate approximation for a ti-84.  Do you have most of the rules for calculating derivatives in the app?  My calculus book has about 40 derivative formulas.  This app is super cool. 

EDIT: hey I am a level 2 member now. 

Opps I knew dy/dx is y'.  I write down y' a bit too often I guess...

I found pi by using the arc length...
To approximate pi you take the equation of a circle and solve for y
x^2 + y^2 = R^2
y = +/- squareroot ( R^2 - X^2 )
We will just use the positive of the squareroot.
y =  squareroot ( R^2 - X^2 )
We know that the circumference of a circle = 2 * pi * r
So... pi = circumference / (2*r)
We will set r to 1 and taking only the positive solution of the squareroot gives half of the diameter.  Therefore...
pi is equal to the arc length of the half circle made by the equation: y = squareroot( 1 - x^2 )
hope that makes sense.
Here's a link to wolfram alpha: https://www.wolframalpha.com/input/?i=integrate+%28++1%2B+%28+-x%2F%28%281-x^2%29^%281%2F2%29%29+%29^2++%29^%281%2F2%29+from+-1+to+1+with+1000+digits

EDIT: I used the partial fractions integration mode and it was like a miracle it solved it!  And it was really fast! Wow! I didn't think anything like this would ever show up on the ti-84 series  (except really over priced ZoomMath  ).

I just threw the hardest partial fractions problem my calculus book has to offer and it was right!! (I don't even think zoomMath can do partial fractions  .)

(3x^3 + 1) / (x^3-x^2+x-1)

The answer is 3 + (x-2)/(x^2+1) + 2/(x-1)

It is hard to say what feature I like the most but I really like the partial fractions feature. (I suck at the harder ones  )

I did find one small bug though in the slope field part.  If you forget to enter the window values and/or the equation the program tells you what you forgot but then after pressing enter an error comes up saying "ERR:LABEL   1:Quit"  It is not really a big problem but it is worth noting.

MAJOR UPDATE
new interface, slope field generator is overhauled, and it's glitch-free! (i think)


check it out!

New update,  i hope i fixed it for you
you need to load pic1 to pic4 on your calculator too and keep them unarchived (group them if you can)

and the line integral function isn't working properly right now, i'll fix that

i thought that if you compiled the pics along with the program in basicbuilder, that you didn't had to have them on your calc but apparently i was wrong...
and yeah i'll be on a trip with my class to france, so i won't be online too

another minor update
fixed some bugs, like the one in the taylor series function, and i've optimized the partial fractions function