If the equation of one tangent to the circle with centre at (2, ?1) from the origin is \[3x+y=0\], then the equation of the other tangent through the origin is

If the equation of one tangent to the circle with centre at (2, ?1) fr

1.	If the equation of one tangent to the circle with centre at (2, ?1) from the origin is \[3x+y=0\], then the equation of the other tangent through the origin is
A.	\[3x-y=0\]
B.	\[x+3y=0\]
C.	\[x-3y=0\]
D.	\[x+2y=0\]
Answer» D. \[x+2y=0\]

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If the equation of one tangent to the circle with centre at (2, ?1) from the origin is \[3x+y=0\], then the equation of the other tangent through the origin is

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