circle

Related Questions

• The number of common tangents to the circles ${{x}^{2}}+{{y}^{2}}-x=0,\,{{x}^{2}}+{{y}^{2}}+x=0$ is

  ---

• The point at which the normal to the circle ${{x}^{2}}+{{y}^{2}}+4x+6y-39=0$ at the point (2, 3) will meet the circle again, is

  ---

• The equations of the tangents to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ parallel to the line $\sqrt{3}x+y+3=0$ are

  ---

• If $a>2b>0$ then the positive value of m for which $y=mx-b\sqrt{1+{{m}^{2}}}$ is a common tangent to ${{x}^{2}}+{{y}^{2}}={{b}^{2}}$ and ${{(x-a)}^{2}}+{{y}^{2}}={{b}^{2}}$ , is

  ---

• The centres of the circles ${{x}^{2}}+{{y}^{2}}=1$ , ${{x}^{2}}+{{y}^{2}}+6x-2y=1$ and ${{x}^{2}}+{{y}^{2}}-12x+4y=1$ are

  ---