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

### Question Asked by a Student from EXXAMM.com Team

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

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

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