circle

Related Questions

• If line $ax+by=0$ touches ${{x}^{2}}+{{y}^{2}}+2x+4y=0$ and is a normal to the circle ${{x}^{2}}+{{y}^{2}}-4x+2y-3=0$ , then value of (a,b) will be

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• If OA and OB be the tangents to the circle ${{x}^{2}}+{{y}^{2}}-6x-8y+21=0$ drawn from the origin O, then $AB =$

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• The equations of the tangents to circle $5{{x}^{2}}+5{{y}^{2}}=1$ , parallel to line $3x+4y=1$ are

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• If a circle passes through the points of intersection of the coordinate axis with the lines $\lambda x-y+1=0$ and $x-2y+3=0$ , then the value of $\lambda $ is

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• 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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