Casio CFX-9950GB PLUS Program Manual - Page 8

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Casio CFX-9950GB PLUS Program Manual
Program for

Circle and Tangents

Description
With this program, slope
x'
y'
point A (
,
) and are tangent to a circle with a radius of
out the coordinates at the points of tangency, and factor zoom is used to enlarge the graph.
Example
To determine
r
= 1
x'
= 3
y'
= 2
Notes
• The point plotted for A cannot be moved. Even if it is moved on the graph, the calculation is
performed using the original value.
• An error occurs when
• Be sure to always perform a trace operation whenever you select trace and the message
TRACE is on the display.
Preparation and operation
• Store the program written on the next page.
• Execute the program as shown below.
A
B
C
D
E
F
G
418
PROGRAM SHEET
Y
r
0
m
and intercept
m
b
and
for the following values:
r
x'
=
.
H
I
J
K
L
M
N
Formula for circle:
A
Formula for tangent line passing
(x',y')
through point A (
X
b
y'
mx'
(=
–
) are obtained for lines drawn from
r
. The trace function is used to read
O
P
Q
R
S
T
U
No.
4
x
2
y
2
r
2
+
=
x'
y'
,
):
y
y'
m
x
x'
–
=
(
–
)
m
*
represents the slope of
the tangent line
V
W
X
Y
Z