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Mathematics
Mathematics
Problem
The locus of the point of intersection of two perpendicular tangents of the ellipse
x
2
9
+
y
2
4
=
1
\frac{x^2}{9} + \frac{y^2}{4} = 1
9
x
2
+
4
y
2
=
1
is a.
x
2
+
y
2
=
4
x^2 + y^2 = 4
x
2
+
y
2
=
4
b.
x
2
+
y
2
=
9
x^2 + y^2 = 9
x
2
+
y
2
=
9
c.
x
2
+
y
2
=
13
x^2 + y^2 = 13
x
2
+
y
2
=
13
d.
x
2
+
y
2
=
5
x^2 + y^2 = 5
x
2
+
y
2
=
5
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