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Using Blackline Master 6.2
To solve a trigonometric equation graphically using the CALC feature of the
Sharp graphing calculator, you will turn the calculator on and press Y=
to access and clear Y1 of an old expression. Solving can be done in degrees and
radians. Let's do this one in radians by pressing 2ndF
B DRG, and double touching 2 Rad. Press 2ndF
To find the solutions of 2 sin
b
a
2
–
Set your viewing window to the principal values for sine and cosine by pressing
(–)
WINDOW
(–)
4
ENTER
the graph.
To "calculate" an intercept (solution), press 2ndF
5 X_Incpt. You can calculate another intercept by pressing 2ndF
and double touching 5 X_Incpt again.
Pressing 2ndF
26
Solving Trigonometric Equations/TRIGONOMETRY USING THE SHARP EL-9600
2
x – cos x – 1 = 0, press 2
cos
X/ /T/n
–
1
2ndF
÷
2
ENTER
1
ENTER
1
ENTER
CALC and double touching 5 X_Incpt will find the third solution.
SET UP , touching
QUIT to exit the menu.
(
sin
ENTER .
2ndF
ENTER
1
ENTER . Press GRAPH to view
CALC and double touch
CL
X/ /T/n
)
2ndF
÷
CALC
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