Programming Using TI-83

							Programming Using TI-83
MPM 2D1

Assignment: Program a TI-83 calculator to calculate an unknown measure in an
acute triangle

A: Sine Law for an unknown angle

Enter the following program to use the Sine Law to find an unknown angle measure:

   1. Create the program
         o Press [PRGM] and select NEW
         o Type the following name using the green [ALPHA] keys:
             LASTNAMES1
             e.g., COLESS1            *Note: you do not need to push [ALPHA]
         o Press [ENTER]

   2. Enter the program
         a. Clear home screen
                 o Press [PRGM]
                 o From the I/O (Input/Output) menu, select 8: ClrHome
                 o Press [ENTER]
         b. Ask for the known angle, A, and the two known sides, x and y.
                 o Press [PRGM]
                 o From the I/O (Input/Output) menu, select 2: Prompt
                 o Press [ALPHA] A [,] [ALPHA] X [,] [ALPHA] Y
                 o Press [ENTER]
         c. Calculate the unknown angle, B.
                 o Press [2nd] [SIN-1]. Type Y x sin(A) / X using the [ALPHA] key
                    for variables and brackets as needed. Then press [)] [STO>],
                    and type B.
                 o Press [ENTER]
         d. Display the answer.
                 o Press [PRGM]
                 o From the I/O (Input/Output) menu, select 3: Disp
                 o Type “ANGLEB:” using [ALPHA]. Then press [,] and type B
                 o Press [ENTER]

   3. Test the Program.
         a. Press [2nd] [QUIT] to return to the home screen
         b. Run the program
                 o Press [PRGM]
                 o From the EXEC menu, select the title of your program
                 o Press [ENTER] twice
                 o Enter the information for the following triangle A

                 o Verify the unknown by hand                       63


                                                                                    Y = 18




                                                         ?

                                                     B              X = 21                   C
B: Sine Law for an unknown side                                                     A


Create a Sine Law program that will calculate an
                                                                                25
unknown side. Name the program LASTNAMES2.
Use the following triangle to verify that your program
works.                                                                                   Y= ?




                                                                    81
                                                             B                                   C
                                                                          X = 19




C: Cosine Law for an unknown side                                          A


Create a Cosine Law program that will calculate an
unknown side. Name the program LASTNAMEC1.                                                  Y = 24
                                                                 Z=?
Use the following triangle to verify that your
program works.


                                                                                               48

                                                         B                                               C
                                                                           X = 19




D: Cosine Law for an unknown angle
                                                                            A
Create a Cosine Law program that will calculate an
unknown angle. Name the program LASTNAMEC2.
Use the following triangle to verify that your
                                                                 Z = 24                 Y = 28
program works.

                                                                                        ?
                                                         B                                           C
                                                                          X = 35




HAND IN YOUR CALCULATOR FOR MARKING