An angle between the plane x + y + z = 5 and the line of intersection of the planes, 3x + 4y + z - 1 = 0 and...

Question

An angle between the plane x + y + z = 5 and the line of intersection of the planes, 3x + 4y + z - 1 = 0 and 5x + 8y + 2z + 14 = 0, is

Accepted Answer

(D)

JEE Main 2018 Mathematics question