1.

The locus of the point of intersection of the perpendicular tangents to the ellipse \[\frac{{{x}^{2}}}{9}+\frac{{{y}^{2}}}{4}=1\] is  [Karnataka CET 2003]

A.            \[{{x}^{2}}+{{y}^{2}}=9\]           
B.            \[{{x}^{2}}+{{y}^{2}}=4\]
C.            \[{{x}^{2}}+{{y}^{2}}=13\]         
D.            \[{{x}^{2}}+{{y}^{2}}=5\]
Answer» D.            \[{{x}^{2}}+{{y}^{2}}=5\]


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