The equations of the tangents to the circle \[{{x}^{2}}+{{y}^{2}}=50\]at the points where the line \[x+7=0\]meets it, are

The equations of the tangents to the circle \[{{x}^{2}}+{{y}^{2}}=50\]

1.	The equations of the tangents to the circle \[{{x}^{2}}+{{y}^{2}}=50\]at the points where the line \[x+7=0\]meets it, are
A.	\[7x\pm y+50=0\]
B.	\[7x\pm y-5=0\]
C.	\[y\pm 7x+5=0\]
D.	\[y\pm 7x-5=0\]
Answer» B. \[7x\pm y-5=0\]

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The equations of the tangents to the circle \[{{x}^{2}}+{{y}^{2}}=50\]at the points where the line \[x+7=0\]meets it, are

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