Circle And Tangents - Casio FX-9750G plus User Manual

Program for
Description
With this program, slope
point A (
out the coordinates at the points of tangency, and factor zoom is used to enlarge the graph.
Example
To determine
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
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Circle and Tangents

Y
r
0
m
and intercept
x' y'
, ) and are tangent to a circle with a radius of
m b
and for the following values:
r
= 1
x'
= 3
y'
= 2
r x'
= .
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PROGRAM SHEET
A
(x',y')
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
Formula for circle:
x y r
2 + 2 = 2
Formula for tangent line passing
x' y'
through point A ( , ):
y y' m x x'
– = ( – )
m
* represents the slope of
the tangent line
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X
Y
Z