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Mathematics
Mathematics
Problem
Find the angle between the circles
S
:
x
2
+
y
2
−
4
x
+
6
y
+
11
=
0
S: x^2 + y^2 - 4x + 6y + 11 = 0
S
:
x
2
+
y
2
−
4
x
+
6
y
+
11
=
0
and
S
′
:
x
2
+
y
2
−
2
x
+
8
y
+
13
=
0
\text{and } S': x^2 + y^2 - 2x + 8y + 13 = 0
and
S
′
:
x
2
+
y
2
−
2
x
+
8
y
+
13
=
0
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