pair-st-lines

Related Questions

• The angle between the lines represented by the equation $({{x}^{2}}+{{y}^{2}})\sin \theta +2xy=0$ is

  ---

• The equation $4{{x}^{2}}+12xy+9{{y}^{2}}+2gx+2fy+c=0$ will represents two real parallel straight lines, if

  ---

• If the equation $A{{x}^{2}}+2Bxy+C{{y}^{2}}+Dx+Ey+F=0$ represents a pair of straight lines, then ${{B}^{2}}-AC$

  ---

• If the bisectors of the angles between the pairs of lines given by the equation $a{{x}^{2}}+2hxy+b{{y}^{2}}=0$ and $a{{x}^{2}}+2hxy+b{{y}^{2}}+\lambda ({{x}^{2}}+{{y}^{2}})=0$ be coincident, then $\lambda =$

  ---

• If the slope of one of the lines represented by $a{{x}^{2}}+2hxy+b{{y}^{2}}=0$ be the square of the other, then

  ---