circle

Related Questions

• If OA and OB are the tangents from the origin to the circle ${{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0$ and C is the centre of the circle, the area of the quadrilateral $OACB$ is

  ---

• The equation of the common chord of the circles ${{(x-a)}^{2}}+{{(y-b)}^{2}}={{c}^{2}}$ and ${{(x-b)}^{2}}+{{(y-a)}^{2}}={{c}^{2}}$ is

  ---

• The equation of a circle touching the axes of coordinates and the line $x\cos \alpha +y\sin \alpha =2$ can be

  ---

• The equation of the normal to the circle ${{x}^{2}}+{{y}^{2}}=9$ at the point $\left( \frac{1}{\sqrt{2}},\frac{1}{\sqrt{2}} \right)$ is

  ---

• The circle ${{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0$ bisects the circumference of the circle ${{x}^{2}}+{{y}^{2}}+2g'x+2f'y+c'=0$ , if

  ---