APPLICATIONS WITH RIGHT TRIANGLES
Steps for using the calculator to solving applications with
right triangles
1. Turn the calculator on and set it to degree mode by pressing 2ndF
B (DRG) 1 (Deg). Press 2ndF
2. Given a right triangle with A = 3 and C = 6, find B and θ using the SOLVER.
To access the SOLVER, press 2ndF
equation that may appear on the screen.
3. Type in the equation sin θ =
ALPHA
=
4. Press 2ndF
Equation solver. Press ENTER and see the list of variables.
5. Press ▼ to move the blinking cursor over the A and press 3
Type in the value of C by pressing 6
▲
▲
2nd
6. To use the SOLVER to find B, edit the current equation to the new equation
B
cos θ =
. Do this by pressing CL
C
A
sin θ =
C
Press DEL to delete sin. Press
the numerator of the fraction. Press ALPHA
delete A.
7. Press ENTER to see the variable list. The value for θ and C will remain as
before. Press ▼ to position the cursor over the B and press 2ndF
to find B.
Advanced Keyboard/TRIGONOMETRY USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
A
C
a/b
ALPHA
A
SOLVER
A (METHOD) 1 (Equation) to choose the
EXE .
. With the cursor over the s in sin, press cos to insert cos.
QUIT to exit the set up menu.
SOLVER , and press CL to delete any
with the keystrokes sin
ALPHA
C .
ENTER . Solve for θ by pressing
CL to display the current equation
to move the cursor over the A in
B to insert B. Press DEL to
11
SET UP ,
θ
ALPHA
ENTER .
EXE