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Mathematics
Problem
Which rectangular equation represents the same curve as the polar equation
r
=
4
cos
θ
r = 4\cos\theta
r
=
4
cos
θ
? a)
x
2
+
y
2
=
16
x^2 + y^2 = 16
x
2
+
y
2
=
16
b)
(
x
+
2
)
2
+
y
2
=
4
(x+2)^2 + y^2 = 4
(
x
+
2
)
2
+
y
2
=
4
c)
(
x
−
2
)
2
+
y
2
=
4
(x-2)^2 + y^2 = 4
(
x
−
2
)
2
+
y
2
=
4
d)
y
=
4
x
y = 4x
y
=
4
x
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