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    Question

    If x = 3tan t, y = 3sec t, then the value of

    d2y/dx2 at t = π/4​ is:
    A 1/6 Correct Answer Incorrect Answer
    B 1/(6√2) Correct Answer Incorrect Answer
    C 1/(3√2) Correct Answer Incorrect Answer
    D 1/3 Correct Answer Incorrect Answer

    Solution

    Given x=3tant and y=3sect. First, finddy/dx and then d2y/dx2

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