(A) find the equation of a line parallel to x-axis and passing through the origin.
(b) Find the direction-cosines of a line parallel to the line :
`(2x - 5)/(4) = (y + 4)/(3) = (6 - z)/(6)`.
(c) Write the direction-cosines of a line parallel to the line :
`(3 - x)/(3) = (y + 2)/(-2) = (z + 2)/(6)`.

Answer

(a) `(x)/(1) = (y)/(0) = (z)/(0) " " (b) lt (2)/(7), (3)/(7) , (-6)/(7) gt " " (c) lt - (3)/(7), (-2)/(7), (6)/(7) gt`