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The angle between the lines whose direct...

The angle between the lines whose direction cosines satisfy the equations `l+m+n=0 " and " l^(2)=m^(2)+n^(2)` is

A

`15 ^(@) `

B

` 30 ^(@) `

C

` 60^(@) `

D

` 45 ^(@) `

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Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-REVISION EXERCISE -STRAIGHT LINES
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  9. Let A (2,3,5) , B ( -1,3,2) and C( lambda ,5, mu ) be the vertices ...

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  11. The plane containing the line (x-1)/(1) =(y-2)/( 2) =(z-3)/(3) and ...

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  12. A symmetrical form of the line of intersection of the planes x= ay +b...

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  14. Equation of the line of shortest distance between the lines (x)/(1) =...

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  15. If the angle theline 2(x+1)=y=z+4 and the plane 2x-y+sqrt(lambda)z+4=0...

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  16. Shortest distance between z-axis and the line (x-2)/(3) =(y-5)/(2) =(...

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  17. Let L be the line x-4 =y-2 =(z-7)/(2) and P be the plane 2x - 4y +z =...

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