circle

Related Questions

• The radical centre of the circles ${{x}^{2}}+{{y}^{2}}+4x+6y=19,{{x}^{2}}+{{y}^{2}}=9$ and ${{x}^{2}}+{{y}^{2}}-2x-2y=5$ will be

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• If the radius of the circle ${{x}^{2}}+{{y}^{2}}$ $-18x+12y+k=0$ be 11, then $k=$

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• Consider the circles ${{x}^{2}}+{{(y-1)}^{2}}=$ $9,{{(x-1)}^{2}}+{{y}^{2}}=25$ . They are such that

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• The circle ${{x}^{2}}+{{y}^{2}}-3x-4y+2=0$ cuts x-axis at

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• The gradient of the tangent line at the point $(a\cos \alpha ,a\sin \alpha )$ to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ , is

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