Math Question

I just happened to have been studying for the SATs recently and am trying to create programs on my calculator to aid my testing.  I am trying to make one using the sine and cosine rules to solve a triangle.  
I am making a program on my TI 84 SI calculator in preparation for the upcoming SATs and it is to find the rest of the unknown sides/angles given SSS, SAS, AAS, or something else i cant remember, but thats not important where S is a side and A is an angle ( SAS means angle in between two sides) i am trying to use the sine rule and cosine rule to solve and since there are no lower case letters on the TI84 SI, i am using A as one angle, B as second, and C as third going clockwise and D as angle opposite to A, E opposite to B, and F opposite to C
my program looks a bit like this, although i dont have it letter for letter cause dont have calculator with me, it would be nice if u could just look at the framework
dispay:"set calculator to degree mode"
display:"1 for SSS, 2 for SAS, 3 for AAS,
input "4 for somethiing i cant remember",Q
if Q=1,
then
display cos^-1((C^2+B^2-A^2)/2BC)
display cos^-1((A^2+B^2-C^2)/2BA)
display cos^-1((C^2+A^2-B^2)/2AC)
end

etc but i have been testing these out with special right triangles and it wont seem 2 work, can any1 help? i also could have some help with the SAS and AAS programs which i could not put on due to character limitations. if you could hep me point out an error i would greatly appreciate it and could fix the programs for the other three options. PLZ help a student in need! and in case you are in high school and are worried about me being a competetor or something, i just want to say that I am in middle school and am only taking the SATs for fun and to see what they're like. PLease help!


any help would be greatly apreciated especially before jan 20, but i could really use this help in general anytime
thanks!