Show that the following planes are at right angles:
(i) and
(ii) and
To show the right angle between two planes, we simply find the angle between the normal vectors of planes. So if n1 and n2 are normal vectors and θ is the angle between both then
.for right angle θ=90°
Cos90°=0
(1)
(i)On comparing with standard equation
Hence proved planes at right angles.
(ii) On comparing with the standard equation of a plane
Hence proved planes at right angles.