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Find the direction cosines of the line s...

Find the direction cosines of the line segment joining the points `P(2,3 -6)` and `Q(3, -4, 5)`

Text Solution

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`PQ=(3-2,-4-3,5-(-6))`
DR of PQ=(1,-7,11)
distance` PQ=sqrt(1^2+(-7)^2+11^2)`
`PQ=sqrt171`
`PQ=3sqrt19`
Distance of PQ`(1/(3sqrt19),(-7)/(3sqrt19),11/(3sqrt19))`.
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