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Problem
Problem
Find the angle between the lines
(
a
2
−
a
b
)
y
=
(
a
b
+
b
2
)
x
+
a
3
(a^2 - ab)y = (ab + b^2)x + a^3
(
a
2
−
ab
)
y
=
(
ab
+
b
2
)
x
+
a
3
and
(
a
b
+
a
2
)
y
=
(
c
b
−
b
2
)
x
+
a
3
\text{and } (ab + a^2)y = (cb - b^2)x + a^3
and
(
ab
+
a
2
)
y
=
(
c
b
−
b
2
)
x
+
a
3
where
a
>
b
>
0
a > b > 0
a
>
b
>
0
.
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