Let the foot of perpendicular from a point P(1, 2, –1) to the straight line L : x 1 = y 0 = z -1 be N. Let a...

Question

Let the foot of perpendicular from a point P(1, 2, –1) to the straight line L : x 1 = y 0 = z -1 be N. Let a line be drawn from P parallel to the plane x + y + 2z = 0 which meets L at point Q. If is the acute angle between the lines PN and PQ, then is equal to :

Accepted Answer

(C)

JEE Main 2021 Mathematics question

Solution