Programming Using TI-83

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11/7/2012
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```							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]
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.
b. Run the program
o Press [PRGM]
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

```
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