Writing the equation of the plane in the normal
form, we have
2
3
4
6
29
29
29
29
x
y
z
−
+
=
where, 
2
3
4
,
,
29
29
29
−
 are the direct ion
cosines of the OP Since d c ’s and direction ratios of a line are proportional, we have
21
29
x
 =
1
1
3
4
29
29
y
z
=
−
= k
i