1 In each of the following cases, determine the direction cosines of the normal to the plane and the distance from the origin.
(a) z = 2
Equation of plane Z=2, i.e.
The direction ratio of normal is 0,0,1
Divide equation by 1 from both side
Hence, direction cosins are 0,0,1.
The distance of the plane from the origin is 2.