circle

Related Questions

• If the circle ${{(x-h)}^{2}}+{{(y-k)}^{2}}={{r}^{2}}$ touches the curve $y={{x}^{2}}+1$ at a point (1, 2), then the possible locations of the points (h, k) are given by

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• 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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• The co-ordinates of pole of line $lx+my+n=0$ with respect to circles ${{x}^{2}}+{{y}^{2}}=1$ , is

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• The equation of the circle with centre on the x-axis, radius 4 and passing through the origin, is

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• The equation to the tangents to the circle ${{x}^{2}}+{{y}^{2}}=4$ , which are parallel to $x+2y+3=0$ , are

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