circle

Related Questions

• If the line $lx+my=1$ be a tangent to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ , then the locus of the point (l, m) is

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• The equation of the circle which passes through the origin, has its centre on the line $x+y=4$ and cuts the circle ${{x}^{2}}+{{y}^{2}}-4x+2y+4=0$ orthogonally, is

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• The straight line $x-y-3=0$ touches the circle ${{x}^{2}}+{{y}^{2}}-4x+6y+11=0$ at the point whose co-ordinates are

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• If the straight line $y=mx+c$ touches the circle ${{x}^{2}}+{{y}^{2}}-4y=0$ , then the value of c will be

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• A circle with centre (a, b) passes through the origin. The equation of the tangent to the circle at the origin is

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