circle

Related Questions

• The circles ${{x}^{2}}+{{y}^{2}}=9$ and ${{x}^{2}}+{{y}^{2}}-12y+27=0$ touch each other. The equation of their common tangent is

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• The equation of the circle passing through the point (–2, 4) and through the points of intersection of the circle ${{x}^{2}}+{{y}^{2}}-2x-6y+6=0$ and the line $3x+2y-5=0$ , is

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• If the equation $\frac{K{{(x+1)}^{2}}}{3}+\frac{{{(y+2)}^{2}}}{4}=1$ represents a circle, then $K=$

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• The polars drawn from (–1, 2) to the circles ${{S}_{1}}\equiv {{x}^{2}}+{{y}^{2}}+6y+7=0$ and ${{S}_{2}}\equiv {{x}^{2}}+{{y}^{2}}+6x+1=0$ , are

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• The equations of the tangents drawn from the origin to the circle ${{x}^{2}}+{{y}^{2}}-2rx-2hy+{{h}^{2}}=0$ are

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