circle

Related Questions

• If OA and OB are the tangents from the origin to the circle ${{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0$ and C is the centre of the circle, the area of the quadrilateral $OACB$ is

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• If the circles ${{x}^{2}}+{{y}^{2}}+2ax+cy+a=0$ and ${{x}^{2}}+{{y}^{2}}-3ax+dy-1=0$ intersect in two distinct points $P$ and $Q$ then the line $5x+by-a=0$ passes through $P$ and $Q$ for

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• The equation of the circle which passes through the point of intersection of circles ${{x}^{2}}+{{y}^{2}}-8x-2y+7=0$ and ${{x}^{2}}+{{y}^{2}}-4x+10y+8=0$ and having its centre on$y$ -axis, will be

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• Two tangents drawn from the origin to the circle ${{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0$ will be perpendicular to each other, if

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• The condition that the line $x\cos \alpha +y\sin \alpha =p$ may touch the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ is

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