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A tangent having slope of _ to the ellipse
 +  = 1 intersects the major & minor axes in points A & B respectively. If C is the centre of the ellipse then the area of the triangle ABC is
  • a)
    12 sq. units
  • b)
    24 sq. units
  • c)
    36 sq. units
  • d)
    48 sq. units
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A tangent having slope of _to the ellipse+= 1 intersects the major &am...
Since the major axis is along the y-axis.
∴ Equation of tangent is x = my + [b2m2 + a]1/2
Slope of tangent = 1/m = −4/3    
⇒ m = −3/4
Hence, equation of tangent is 4x+3y=24 or  
x/6 + y/8 = 1
Its intercepts on the axes are 6 and 8.
Area (ΔAOB) = 1/2×6×8
= 24 sq. unit
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A tangent having slope of _to the ellipse+= 1 intersects the major &am...
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A tangent having slope of _to the ellipse+= 1 intersects the major &am...
Since the major axis is along the y-axis.
∴ Equation of tangent is x = my + [b2m2 + a]1/2
Slope of tangent = 1/m = −4/3    
⇒ m = −3/4
Hence, equation of tangent is 4x+3y=24 or  
x/6 + y/8 = 1
Its intercepts on the axes are 6 and 8.
Area (ΔAOB) = 1/2×6×8
= 24 sq. unit
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A tangent having slope of _to the ellipse+= 1 intersects the major & minor axes in points A & B respectively. If C is the centre of the ellipse then the area of the triangle ABC isa)12 sq. unitsb)24 sq. unitsc)36 sq. unitsd)48 sq. unitsCorrect answer is option 'B'. Can you explain this answer?
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