From a point perpendiculars P Q | Maths | JEE Advance 2014

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Question

From a point $P(\lambda, \lambda, \lambda)$, perpendiculars $P Q$ and $P R$ are drawn respectively on the lines $y=x, z=1$ and $y =-x, z=-1$. If $P$ is such that $\angle Q P R$ is a right angle, then the possible value(s) of $\lambda$ is(are)

Select the correct option:

A

$\sqrt{2}$

B

1

C

-1

D

$-\sqrt{2}$

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Solution

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