circle

Related Questions

• The equations of the normals to the circle ${{x}^{2}}+{{y}^{2}}-8x-2y+12=0$ at the points whose ordinate is –1, will be

  ---

• A line is drawn through a fixed point $P(\alpha ,\ \beta )$ to cut the circle ${{x}^{2}}+{{y}^{2}}={{r}^{2}}$ at A and B. Then $PA\ .\ PB$ is equal to

  ---

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

  ---

• If the circles ${{x}^{2}}+{{y}^{2}}=4,{{x}^{2}}+{{y}^{2}}-10x+\lambda =0$ touch externally, then $\lambda $ is equal to

  ---

• The equation of pair of tangents to the circle ${{x}^{2}}+{{y}^{2}}-2x+4y+3=0$ from $(6,-5)$ , is

  ---