Applications With Right Triangles - Sharp EL-9900 Manual

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