1.

If the centre of a circle is (2, 3) and a tangent is \[x+y=1\], then the equation of this circle is                      [RPET 1985, 89]

A.            \[{{(x-2)}^{2}}+{{(y-3)}^{2}}=8\]                                   
B.            \[{{(x-2)}^{2}}+{{(y-3)}^{2}}=3\]
C.            \[{{(x+2)}^{2}}+{{(y+3)}^{2}}=2\sqrt{2}\]                 
D.            \[{{(x-2)}^{2}}+{{(y-3)}^{2}}=2\sqrt{2}\]
Answer» B.            \[{{(x-2)}^{2}}+{{(y-3)}^{2}}=3\]


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