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Tangent of a given slope to an ellipse or a hyperbola: its equation, its intercepts or the triangle it cuts off with the axes

This type of question, asked 4 times: 22 Apr 2025 S1, 26 Apr 2025 S2, 17 Apr 2026 S1, 19 Apr 2026 S1. All 4 questions below, oldest first.

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  1. Question 1

    22 Apr 2025 S1

    142
    The X and Y intercepts of the tangent to the hyperbola x220−y25=1\frac{x^{2}}{20}-\frac{y^{2}}{5}= 1 which is perpendicular to the line 4x+3y=74x+ 3y= 7, are respectively

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  2. Question 2

    26 Apr 2025 S2

    141
    The tangent to the ellipse 9x2+16y2=2889x^{2}+ 16y^{2}= 288 making equal intercepts on the co-ordinate axes intersects the X -axis and the Y -axis in the points A and B respectively. Then A(△OAB)=A( \bigtriangleup OAB) = (where O is origin)

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  3. Question 3

    17 Apr 2026 S1

    59
    The equations of the tangents to the ellipse x216+y29=1\dfrac{x^2}{16} + \dfrac{y^2}{9} = 1 making an inclination of 30∘30^\circ with the major axis are

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  4. Question 4

    19 Apr 2026 S1

    59
    A tangent having slope −12-\dfrac{1}{2} to the ellipse 3x2+4y2=123x^2 + 4y^2 = 12 intersects the X-axis and Y-axis at the points A and B respectively. if O is the origin, then the area of △AOB\triangle AOB is ...

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