Calculator Programs

[Dreamt_in_a_Nightmare]

In our school we get TI-83 graphing calculators for our trigonometry class. I just program everything into my calculator so i don't have to do the work. I just thought I'd share a few with everyone and hopefully help them out. Plus if anyone has some new programs or even easier ways to do it, I'd appreciate it.

Area

: ClrHome
: Disp “1=SQUARE”,“2=CIRCLE”,“3=TRIANGLE”,“4=CUBE”,“5=SPHERE”,
“6=CYLINDER”,“7=CONE”
: Input X
: If X=1
: Then
: Prompt B,H
: B*H→X
: Disp X
: Else
: If X=2
: Then
: Prompt R
: πR²→X
: Disp X
: Else
: If X=3
: Then
: Prompt B,H
: 1/2BH→X
: Disp X
: Else
: If X=4
: Then
: Prompt H,L,W
: 2HW+2HL+2WL→X
: Disp X
: Else
: If X=5
: Then
: Prompt R
: 4πR²→X
: Disp X
: Else
: If X=6
: Then
: Prompt H,R
: 2πRH+2πR²→X
: Disp X
: Else
: If X=7
: Then
: Prompt R,S
: πR²+πRS→X
: Disp X


Autoquad (Quadratic Functions)

: ClrHome
: Disp “AX²+BX+C”
: Prompt A,B,C
: (A*C)→C
: (-B-√(B²-4C))/2→X
: If X<0
: Disp “X-”,X
: If X>0
: Disp “X-”,X
: (-B+√(B²-4C))/2→Y
: If Y<0
: Disp “X+”,-Y
: If Y>0
: Disp “X-”,Y




Distance (of a line)

: ClrHome
: Disp “X1=A”,“Y1=B”,“X2=C”,“Y2=D”
: Prompt A,B,C,D
: √((C-A)²+(D-B)²)→X
: Disp “DISTANCE=”,X
: ((A+C)2)→Y
: ((B+D)2)→Z
: Disp “MIDPOINT=”,Y,Z




Any questions or tips, feel free to explain. Hope it helps.