A line is drawn through a fixed point \[P(\alpha ,\beta )\] to cut the circle \[{{x}^{2}}+{{y}^{2}}={{a}^{2}}\] at A and B, then PA.PB is equal to

\[{{\alpha }^{2}}+{{\beta }^{2}}\]

\[{{\alpha }^{2}}+{{\beta }^{2}}-{{\alpha }^{2}}\]

\[{{\alpha }^{2}}+{{\beta }^{2}}+{{\alpha }^{2}}\]

A line is drawn through a fixed point \[P(\alpha ,\beta )\] to cut the

1.	A line is drawn through a fixed point \[P(\alpha ,\beta )\] to cut the circle \[{{x}^{2}}+{{y}^{2}}={{a}^{2}}\] at A and B, then PA.PB is equal to
A.	\[{{\alpha }^{2}}+{{\beta }^{2}}\]
B.	\[{{\alpha }^{2}}+{{\beta }^{2}}-{{\alpha }^{2}}\]
C.	\[{{\alpha }^{2}}\]
D.	\[{{\alpha }^{2}}+{{\beta }^{2}}+{{\alpha }^{2}}\]
Answer» C. \[{{\alpha }^{2}}\]

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A line is drawn through a fixed point \[P(\alpha ,\beta )\] to cut the circle \[{{x}^{2}}+{{y}^{2}}={{a}^{2}}\] at A and B, then PA.PB is equal to

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