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If the direction rations of two lines ar...

If the direction rations of two lines are given by 3lm-4ln+mn = 0 and l + 2m + 3n = 0 then the angle between the lines is

A

`pi//2`

B

`pi//3`

C

`pi//4`

D

`pi//6`

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DIPTI PUBLICATION ( AP EAMET)-DIRECTION COSINES AND DIRECTION RATIOS-EXERCISE 1
  1. If the d.c.'s (l, m, n) of two lines are connected by the relations l+...

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  2. If the direction ratios of two lines are given by l+m+n=0, mn-2n+lm=0,...

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  3. If the direction rations of two lines are given by 3lm-4ln+mn = 0 and ...

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  4. The acute angle between the two lines whose direction ratios are given...

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  5. Find the angle between the lines whose d.c's are related by l + m + n ...

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  6. The angle between the lines whose direction cosines satisfy the equati...

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  7. If the direction cosines of two lines are given by l+m+n=0 " and " l^(...

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  8. If the d.c.'s (l, m, n) of two lines are connected by the relations 2l...

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  9. P.T the smaller angle theta between any two diagonals of a cube is giv...

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  10. The angle between a diagonal of a cube and the diagonal of a face of t...

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  11. If a line makes angles alpha, beta, lambda,delta with the four diagon...

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  12. If (6,-2,-3),(1,2,2) are d.r's of two lines then the d.c's of line bis...

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  13. The projection of the join of the points (3, 4, 2), (5, 1, 8) on the l...

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  14. The projection of the line segment joining the origin and the point P ...

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  15. The projection of the join of the two points A(2, 3, 4), B(3, 5, -2) o...

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  16. If the projections of the line segment bar(PQ) on the axes are 3, 4, 1...

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  17. If the projections of a line segment on the axes are 3, -4, 12 then th...

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  18. If the porjections of a line segment on the axes are 2, 1, 2 then the ...

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  19. The projections of a vector on the three coordinate axes are 6, -3, 2 ...

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  20. If A = (-2, 3, 4), B = (-4, 4, 6), C = (4, 3, 5), D = (0, 1, 2) then t...

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