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If two tangents drawn from a point P to the parabola y^2=4 x are at right angles, then the locus of P is

Options

  1. A2 x+1=0
  2. Bx=-1
  3. C2 x-1=0
  4. Dx=1

Correct answer

B. x=-1

Step-by-step solution

The locus of perpendicular tangents is directrix i.e, x=-a ; x=-1

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