The equations of the tangents drawn from the origin to the circle \[{{x}^{2}}+{{y}^{2}}-2rx-2hy+{{h}^{2}}=0\]are [Roorkee 1989; IIT 1988; RPET 1996]

\[({{h}^{2}}-{{r}^{2}})x-2rhy=0,x=0\]

\[({{h}^{2}}-{{r}^{2}})x+2rhy=0,x=0\]

The equations of the tangents drawn from the origin to the circle \[{{

1.	The equations of the tangents drawn from the origin to the circle \[{{x}^{2}}+{{y}^{2}}-2rx-2hy+{{h}^{2}}=0\]are [Roorkee 1989; IIT 1988; RPET 1996]
A.	\[x=0,y=0\]
B.	\[({{h}^{2}}-{{r}^{2}})x-2rhy=0,x=0\]
C.	\[y=0,x=4\]
D.	\[({{h}^{2}}-{{r}^{2}})x+2rhy=0,x=0\]
Answer» C. \[y=0,x=4\]

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The equations of the tangents drawn from the origin to the circle \[{{x}^{2}}+{{y}^{2}}-2rx-2hy+{{h}^{2}}=0\]are [Roorkee 1989; IIT 1988; RPET 1996]

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