Area Of A Triangle - Sharp EL-9900 Manual

AREA OF A TRIANGLE

1. Set the calculator to operate in degrees with 2ndF
and 1 (Deg). Press 2ndF
2. Access the SOLVER by pressing 2ndF
any equation on the screen.
3. Type in the equation A =
= a/b 1
4. Press 2ndF
Equation solver. Press ENTER to see the list of variables for your
equation.
5. Find the area of a triangle with base = 4 and height = 8.35. Use ▼ to
move the blinking cursor over B and type in 4. Type in 8.35 for H
and press ENTER . Press ▲ twice to move the prompt to the A variable.
Press 2ndF
6. Save the formula by pressing 2ndF
and press ENTER .
1
7. Enter A =
2
the current equation. Type in the equation with the keystrokes: ALPHA
ALPHA =
θ .
ALPHA
8. Consider the triangle where sides of lengths 4.8 and 5.73 enclose a 47° angle.
Press ENTER to access the variable list, enter 5.73 for B, 4.8 for C (or
vice-versa), and 47 for θ. Move the cursor to the A variable. Press 2ndF
EXE to solve for the area.
Advanced Keyboard/TRIGONOMETRY USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
QUIT to exit the set up screen.
1
B•H with the keystrokes: ALPHA
2
2 ALPHA B
SOLVER A (METHOD) 1 (Equation) to choose the
EXE to find the area of 16.7.
B•C•sin θ by pressing CL a couple times to return to and delete
a/b 1 2
SET UP
SOLVER , and press CL to delete
× ALPHA H
SOLVER C (SAVE). Enter a name
×
ALPHA B ALPHA
15
B (DRG)
A ALPHA
A
×
C sin