Sharp EL-9600 User Manual page 10

To approximate sin 45° graphically, you will press Y= followed by CL to clear
an old expression for Y1. Enter the function sin x by pressing sin X/ /T/n .
To view the graph press ZOOM , touch E TRIG, and double touch 1 sin x.
Now, engage the trace by pressing TRACE and moving the tracer near
x = 45° by pressing .
With the cursor located near x = 45°, you can zoom in to find a better
approximate for the y value. First, set the factors for zooming by pressing
ZOOM , touching B FACTOR, and pressing ENTER 5 ENTER 5 ENTER .
These larger values will accelerate the zooming in. Now, press ZOOM , touch
A ZOOM, and double touch 3 In to zoom in on the cursor. Once again, trace
over near x = 45°. Zoom in two more times to see a better approximation.
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To find sin directly, you will turn the calculator on and press to enter
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computation mode. Press CL to clear the viewing window of any old
expressions. To evaluate trigonometric functions in radian mode, you can set
the calculator to operate in radians by pressing 2ndF SET UP , touching
B DRG, and double touching 2 Rad. Press 2ndF QUIT to exit the menu.
Now, to find sin you will press sin 2ndF a/b 3 ENTER .
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6 Evaluating Trigonometric Functions/TRIGONOMETRY USING THE SHARP EL-9600