The locus of the point of intersection of two tangents to the parabola \[{{y}^{2}}=4ax,\] which are at right angle to one another is

\[{{x}^{2}}+{{y}^{2}}={{a}^{2}}\]

The locus of the point of intersection of two tangents to the parabola

1.	The locus of the point of intersection of two tangents to the parabola \[{{y}^{2}}=4ax,\] which are at right angle to one another is
A.	\[{{x}^{2}}+{{y}^{2}}={{a}^{2}}\]
B.	\[a{{y}^{2}}=x\]
C.	\[x+a=0\]
D.	\[x+y\pm a=0\]
Answer» D. \[x+y\pm a=0\]

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The locus of the point of intersection of two tangents to the parabola \[{{y}^{2}}=4ax,\] which are at right angle to one another is

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