circle

Related Questions

• The radical centre of the circles ${{x}^{2}}+{{y}^{2}}-16x+60=0,\,{{x}^{2}}+{{y}^{2}}-12x+27=0,$ ${{x}^{2}}+{{y}^{2}}-12y+8=0$ is

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• If a circle, whose centre is (–1, 1) touches the straight line $x+2y+12=0$ , then the coordinates of the point of contact are

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• The line $x\cos \alpha +y\sin \alpha =p$ will be a tangent to the circle ${{x}^{2}}+{{y}^{2}}-2ax\cos \alpha -2ay\sin \alpha =0$ , if $p=$

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• For all values of $\theta$ , the locus of the point of intersection of the lines $x\cos \theta +y\sin \theta =a$ and $x\sin \theta -y\cos \theta =b$ is

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• If the line $lx+my+n=0$ be a tangent to the circle ${{(x-h)}^{2}}+{{(y-k)}^{2}}={{a}^{2}},$ then

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