Question
Show that the lines:
and 
are coplanar.
Solution
The equations of given lines are
and
These lines are coplanar
if
i.e. if
i.e. if
![]()
and
These lines are coplanar
if
i.e. if
i.e. if
i.e. if 2(0) = 0 [Since C1, C2 are identical]
i.e. if 0 = 0, which is true.
Hence the result.
