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JEE Main & Advanced Sample Paper JEE Main Sample Paper-23

  • question_answer
    From the point (4, 6), a pair of tangent lines are drawn to the parabola \[{{y}^{2}}=8x\]. The area of the triangle formed by these pair of tangent hues and the chord of contact of the point (4, 6) is

    A)  8                                

    B)  4

    C)  2                                

    D)  6

    Correct Answer: C

    Solution :

    \[A=\frac{{{(y_{1}^{2}-4a{{x}_{1}})}^{3/2}}}{2a};\,\,{{x}_{1}}=4;\,\,{{y}_{1}}=6;\,\,a=2\]


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