circle

Related Questions

• The points of intersection of circles ${{x}^{2}}+{{y}^{2}}=2ax$ and ${{x}^{2}}+{{y}^{2}}=2by$ are

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• The equation of the circle having the lines ${{x}^{2}}+2xy+3x+6y=0$ as its normals and having size just sufficient to contain the circle $x(x-4)+y(y-3)=0$ is

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• The line $(x-a)\cos \alpha +(y-b)$ $\sin \alpha =r$ will be a tangent to the circle ${{(x-a)}^{2}}+{{(y-b)}^{2}}={{r}^{2}}$

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• If $\frac{x}{\alpha }+\frac{y}{\beta }=1$ touches the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ , then point $(1/\alpha ,\,1/\beta )$ lies on a/an

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• The equations of the tangents to the circle ${{x}^{2}}+{{y}^{2}}=50$ at the points where the line $x+7=0$ meets it, are

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