circle

Related Questions

• 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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• The equations of the tangents to the circle ${{x}^{2}}+{{y}^{2}}=36$ which are inclined at an angle of ${{45}^{o}}$ to the x-axis are

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• The equation of pair of tangents to the circle ${{x}^{2}}+{{y}^{2}}-2x+4y+3=0$ from $(6,-5)$ , is

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• P, Q and R are the centres and ${{r}_{1}},\,\,{{r}_{2}},\,\,{{r}_{3}}$ are the radii respectively of three co-axial circles, then $QRr_{1}^{2}+RP\,r_{2}^{2}+PQr_{3}^{2}$ is equal to

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• Locus of the centre of the circle touching both the co-ordinates axes is

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