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Q)Direction cosines of 2 lines are connected by the relation:-al+bm+cn=0 & fmn+gnl+hlm=0.Find the condition that these 2 lines will be (a)perpendicular (b)parellel
2 years ago
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Given equation is Equations of tangents are the roots of this equation is therefore Thanks &Regards, Sunil Raikwar, askIITians faculty.
Let (h,k) be the focus of the hyperbola, since it touches the axis tangent at the vertex should be and the equation of its directrix should be and the perpendicular distance from direcrtrix to tangent...
but sir the answer says it can be both ellipse as well as hyperbola, so can u please prove this as an ellipse too.
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