circle

Related Questions

• Radius of circle $(x-5)(x-1)+(y-7)(y-4)=0$ is

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• The number of common tangents to the circles ${{x}^{2}}+{{y}^{2}}-x=0,\,{{x}^{2}}+{{y}^{2}}+x=0$ is

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• The equation of the circle which passes through the origin and cuts off intercepts of 2 units length from negative coordinate axes, is

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• If the length of tangent drawn from the point (5, 3) to the circle ${{x}^{2}}+{{y}^{2}}+2x+ky+17=0$ be 7, then $k =$

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• The angle between the tangents from $(\alpha ,\beta )$ to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ , is

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