Question
Find the D.C.’s of the perpendicular from origin to the plane 
Find also the distance of the plane from the origin.
Solution
The equation of plane is
or
Now,
which is of the form
which is perpendicular vector from the origin
∴ direction cosines of
are 
Perpendicular distance = p = 1
or
Now,
which is of the form
which is perpendicular vector from the origin∴ direction cosines of
are Perpendicular distance = p = 1
