Direction ratios of the line represented by the equation x = ay + b, z = cy + d are

(a, 1, c)

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(a, b - d, c)

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(c, 1, a)

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(b, ac, d)

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Solution

The correct option is A
(a, 1, c)

x - ay - b = 0 and cy - z + d = 0
$∴$ If l, m, n are direction cosines, then
$\frac{l}{a} = \frac{m}{1} = \frac{n}{c}$ .
Hence direction ratios are (a, 1, c).

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