Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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Find the Cartesian equation of the line which passes through the point (−2, 4, −5) and is parallel to the line - Mathematics

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Sum

Find the Cartesian equation of the line which passes through the point (−2, 4, −5) and is parallel to the line `(x+3)/3=(4-y)/5=(z+8)/6`

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Solution

The equation of the given line is `(x+3)/3=(4-y)/5=(z+8)/6 or (x+3)/3=(y-4)/-5=(z+8)/6`

The required line is parallel to the given line. Therefore, direction ratios of the required line are the same as the direction ratio of the given line. So, the direction ratios of the required line are 3, − 5, 6.

The equation of the straight line passing through (− 2, 4, − 5) and having direction ratios 3, − 5, 6 is

`(x-(-2))/3=(y-4)/-5=(z-(-5))/6`

`(x+2)/3=(y -4)/-5=(z+5)/6`

Concept: Equation of a Line in Space
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