Graphing Circles - Sharp EL-9900C User Manual

GRAPHING CIRCLES

1. Press Y= and clear old expressions. Press ZOOM
clear viewing window.
2. To graph the circle in the form (x–h)
drawing feature. For example, in the circle (x–3)
and r=1. Press
an 'h' of x=3 by pressing
'k' of y=2 by pressing
center point.
3. Move the cursor the length of the radius in one direction away from the
center. In the example use the arrow key. Move the cursor 1 unit away from
the center and press ENTER . The circle will be drawn with the cursor
appearing at the point in the circle to which you moved.
4. If the circle will not completely appear in the viewing window, zoom out on
the decimal window to a larger window, because any other windows may
distort the circle. Draw the circle again in the larger window.
Basic Keyboard/ALGEBRA USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
2
2ndF DRAW A
repeatedly until x=3. Move the cursor up to a
▼
repeatedly until y=2. Press ENTER to set the
10
A
+ (y–k) 2 = r 2 , you will use the circle
2 + (y–2) 2 = 1
9 (Circle). Move the cursor right to
7 to view a
2 , h=3, k=2