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The equation of the chord of contact of ...

The equation of the chord of contact of the point (1, -2) w.r.t the ellipse `4x^(2)+5y^(2)=20` is

A

a, b, c

B

b, c, a

C

c, a, b

D

b, a, c

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Knowledge Check

  • The equation of the chord of contact of the point (3,-2) w.r.t. the hyperbola 2x^(2) -3y^(2) =12 is

    A
    ` x+y-2=0 `
    B
    ` x+y + 2=0`
    C
    ` x-y-2=0`
    D
    `x+y-3=0`

  • The equation of the chord of contact of the point (4,2) with respect to the circle x^(2)+y^(2)-5x+4y-3=0 is

    A
    `5x-3y-25=0`
    B
    8x-2y-11=0
    C
    3x+8y-18=0
    D
    x-14y-6=0

  • The condition that the chord of contact of the point (b,c) w.r.t. to the circle x^(2)+y^(2)=a^(2) should substend a right angled at the centre is

    A
    `b^(2)+c^(2)=a^(2)`
    B
    `b^(2)+c^(2)=2a^(2)`
    C
    `b^(2)+c^(2)=3a^(2)`
    D
    `2b^(2)+2c^(2)=a^(2)`

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    Pole of the line 2x+3y+4=0 w.r.t. the ellipse x^(2)//2+y^(2)//4=1 is

    The pole of the line 2x-y+2=0 w.r.t the ellipse 3x^(2)+5y^(2)=15 is

    The polar of the point (1,2) w.r.t. the circle x^(2)+y^2-2x-4y-4=0

    The mid point of the chord 2x+5y=12 of the ellipse 4x^(2) + 5y^(2) = 20 is

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