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Mathematics
Problem
The polar curve
r
=
2
a
1
−
cos
θ
r=\dfrac{2a}{1-\cos\theta}
r
=
1
−
cos
θ
2
a
represents which of the following Cartesian equations? a)
(
x
−
a
)
2
+
y
2
=
a
2
(x-a)^{2}+y^{2}=a^{2}
(
x
−
a
)
2
+
y
2
=
a
2
b)
x
2
=
4
a
(
y
+
a
)
x^{2}=4a(y+a)
x
2
=
4
a
(
y
+
a
)
c)
y
2
=
4
a
(
x
+
a
)
y^{2}=4a(x+a)
y
2
=
4
a
(
x
+
a
)
d)
y
2
=
4
a
(
x
−
a
)
y^{2}=4a(x-a)
y
2
=
4
a
(
x
−
a
)
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