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The projections of the segment PQ on the...

The projections of the segment PQ on the coordinate axes are -9,12,-8 respectively. The direction cosines of the line PQ are (A) `-9/sqrt(17),12/sqrt(17),-8/sqrt(17)` (B) `-9/288,12/289,-8/289` (C) `-9/17,12/17,-8/17` (D) none of these

A

`lt(-9)/(sqrt17),12/sqrt17,(-8)/(sqrt17)gt`

B

`lt -9,12,-8gt`

C

`lt-(9)/(289),12/298,(-8)/(289)gt`

D

`lt-(9)/(17),12/17,(-8)/(17)gt`

Text Solution

Verified by Experts

The correct Answer is:
D
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