jee-advanced 1999 Q24

jee-advanced · India Conic sections Tangent and Normal Line Problems

24. If $x = 9$ is the chord of contact of the hyperbola $x 2 - y 2 = 0$, then the equation of the corresponding pair of tangents is :
(A) $9 x 2 - 8 y 2 + 18 x - 9 = 0$
(B) $9 x 2 - 8 y 2 - 18 x + 9 = 0$
(C) $9 x 2 - 8 y 2 - 18 x - 9 = 0$
(D) $9 x 2 - 8 y 2 + 18 x + 9 = 0$

24. If $x = 9$ is the chord of contact of the hyperbola $x 2 - y 2 = 0$, then the equation of the corresponding pair of tangents is :\\
(A) $9 x 2 - 8 y 2 + 18 x - 9 = 0$\\
(B) $9 x 2 - 8 y 2 - 18 x + 9 = 0$\\
(C) $9 x 2 - 8 y 2 - 18 x - 9 = 0$\\
(D) $9 x 2 - 8 y 2 + 18 x + 9 = 0$\\

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