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= CL
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 SET UP , touching
B DRG
, and double touching
2 Rad
. Press 2ndF QUIT to exit the menu.
To find the solutions of 2 sin
2
x
– cos
x
– 1 = 0, press 2 ( sin X/
θ
/T/
n
)
a
b
2 – cos X/
θ
/T/
n
– 1 ENTER .
Set your viewing window to the principal values for sine and cosine by pressing
WINDOW (–)
2ndF
π
÷
2 ENTER 2ndF
π
ENTER 2ndF
π
÷
4 ENTER (–)
1 ENTER 1 ENTER 1 ENTER . Press GRAPH to view
the graph.
To "calculate" an intercept (solution), press 2ndF CALC and double touch
5 X_Incpt
. You can calculate another intercept by pressing 2ndF CALC
and double touching
5 X_Incpt
again.
Pressing 2ndF CALC and double touching
5 X_Incpt
will find the third solution.
26
Solving Trigonometric Equations/TRIGONOMETRY USING THE SHARP EL-9600
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Содержание EL-9600
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