pair-st-lines

Related Questions

• If the angle between the pair of straight lines represented by the equation ${{x}^{2}}-3xy+\lambda {{y}^{2}}+3x-5y+2=0$ is ${{\tan }^{-1}}\left( \frac{1}{3} \right)$, where $'\lambda \,'$is a non negative real number. Then$\lambda $is

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• The lines joining the origin to the points of intersection of the curves $a{{x}^{2}}+2hxy+b{{y}^{2}}+2gx=0$ and $a'{{x}^{2}}+2h'xy+b'{{y}^{2}}+2g'x=0$ will be mutually perpendicular, if

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• Angle between the lines represented by the equation ${{x}^{2}}+2xy\sec \theta +{{y}^{2}}=0$ is

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• Separate equations of lines, for a pair of lines, whose equation is ${{x}^{2}}+xy-12{{y}^{2}}=0$, are

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• The condition of representing the coincident lines by the general quadratic equation $f(x,\,y)=0$, is

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