What are the direction cosines lof the line represented by `3x + y + 2z = 7` and `x + 2 y + 3z = 5` ?

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Q 2329791611.     What are the direction cosines lof the line
represented by

`3x + y + 2z = 7` and `x + 2 y + 3z = 5` ?
NDA 2008 Paper 1
A

`(-1, -7, 5)`

B

`(-1, 7, 5)`

C

`(-1/sqrt(75) , - 7/(sqrt(75) ) , 5/(sqrt(75)))`

D

`(-1/sqrt(75) , 7/(sqrt(75) ) , 5/(sqrt(75)))`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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