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If two tangents drawn from a point P to the parabola y2 = 4x are at right angles, then the locus of P is (1) `2x""+""1""=""0` (2) `x""=""1` (3) `2x""""1""=""0` (4) `x""=""1`

A

2x-1=0

B

x=1

C

2x+1=0

D

x=-1

Text Solution

Verified by Experts

The correct Answer is:
D
4
The locus of the perpendicular tangents is the directrix , hance, the locus of P is x=-1.
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Knowledge Check

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