pair-st-lines

Related Questions

• Which of the following second degree equation represented a pair of straight lines

  ---

• If the angle between the lines represented by the equation ${{y}^{2}}+kxy-{{x}^{2}}$${{\tan }^{2}}A=0$be $2A$, then $k=$

  ---

• The equation ${{x}^{2}}+k{{y}^{2}}+4xy=0$represents two coincident lines, if $k =$

  ---

• Difference of slopes of the lines represented by equation ${{x}^{2}}({{\sec }^{2}}\theta -{{\sin }^{2}}\theta )-2xy\tan \theta +{{y}^{2}}{{\sin }^{2}}\theta =0$is

  ---

• The lines ${{(lx+my)}^{2}}-3{{(mx-ly)}^{2}}=0$ and $lx+my+n=0$ form

  ---