Note: Make sure that your calculator is set to degree mode. The figure below shows a sketch of
⊙
N
with equation
(
x
−
2
)
2
+
(
y
+
1
)
2
=
169
4
. The chord
¯¯¯¯¯¯
A
B
in
⊙
N
is parallel to the
x
-axis, lies below the
x
-axis and has a length of 12 units.
¯¯¯¯¯¯
A
P
and
¯¯¯¯¯¯
B
P
are tangent to
⊙
N
and intersect at point
P
.

pic