Area Of A Circular Sector; Blackline Masters - Sharp EL-9600 User Manual

NAME _____________________________________________________ CLASS __________ DATE __________
10.1

AREA OF A CIRCULAR SECTOR

A lawn sprinkler is set so that the region of the lawn that is watered is
approximately a sector of a circle of radius 6 feet. If the central angle of the
sector is radians, find the area of the region that is watered by the sprinkler.
5
1. Set the calculator to radian mode by pressing 2ndF
B DRG, and double touching 2 Rad. Press 2ndF
up screen.
2. Access the SOLVER by pressing
any equation that appears on the screen.
3. Type in the equation A=
a/b 2
4. Use the Equation solver by pressing 2ndF
and double touch 1 Equation. Press ENTER and see the list of variables.
5. Use to place the cursor over R, type in 6, and press ENTER . Type in
by pressing 2ndF
on the A variable. Press 2ndF
6. Use the Newton solver by pressing 2ndF
double touch 2 Newton. Reset A to 0 to start the problem from the
beginning. The values of R and O are correct for this problem, so use
to place the cursor over the A variable and press 2ndF
Newton solver screen.
7. Since area is never negative, you could set START = 0. Leave the STEP size
as .001 and remember that you should change it to a slightly larger value if
an error message results. Press 2ndF
+ –
1
2
R by pressing ALPHA
2
2
ALPHA R x ALPHA
÷ 5 ENTER . Press
EXE to find the area in square feet.
Blackline Masters/TRIGONOMETRY USING THE SHARP EL-9600
SET UP , touching
QUIT to exit the set
2ndF SOLVER . Press CL to delete
A ALPHA
.
SOLVER , touch A METHOD,
twice to place the cursor
SOLVER , touch A METHOD, and
EXE to view the
EXE to find the area in square feet.
= 1
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