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From a point P (lamda, lamda, lamda) per...

From a point `P (lamda, lamda, lamda)` perpendiculars PQ and PR are drawn respectively on the lines `y =x, z = 1 and y = -x, z = -1`. If P is such that `angleQPR` is a right angle, then the possible value (s) of `lamda` is (are)

A

`sqrt2`

B

1

C

-1

D

`-sqrt2`

Text Solution

Verified by Experts

The correct Answer is:
C
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