Tangents are drawn from the point P(3, 4) to the ellipse touching the ellipse at points A and B.
The equation of the locus of the point whose distances from the point P and the line AB are equal, is
The equation of the locus of the point whose distances from the point P and the line AB are equal, is
- (A)✓ Correct
- (B)
- (C)
- (D)
Answer: (A)
Solution
The locus of points equidistant from a point (focus) and a line (directrix) is a parabola.
Here, the focus is and the directrix is the line .
For a point on the locus:
Squaring both sides:
Here, the focus is and the directrix is the line .
For a point on the locus:
Squaring both sides:
JEE Advanced · 2010 · 11 Apr 2010 · Paper 2 · Single correct option