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The d.c.'s of a line which is equally in...

The d.c.'s of a line which is equally inclined to the coordinate axes are

A

`(1/sqrt(3), 1/sqrt(3), 1/sqrt(3))`

B

`(1/3, 2/3, 2/3)`

C

`(2/7, 3/7, 6/7)`

D

`(3/13, 4/13, 12/13)`

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DIPTI PUBLICATION ( AP EAMET)-DIRECTION COSINES AND DIRECTION RATIOS-EXERCISE 1
  1. A straight line is equally inclined to all the three coorinate axes. T...

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  2. The number of lines which are equally inclined to the coordinate axes ...

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  3. The d.c.'s of a line which is equally inclined to the coordinate axes ...

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  4. If the d.r.'s of a line are (3, -4, 12) then d.c.'s of the line are

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  5. The d.c.'s of the line joining the points A(4, 3, 1), B(-2, 1, -2) are

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  6. If (l(1),m(1),n(1)),(l(2),m(2),n(2)) are d.c's of two lines then find ...

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  7. If (2, 1, -1) and (1, -1, -1) are direction ratios of two lines, then ...

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  8. IF the d.r.'s of oversetharr(OA),oversetharr(OB) are (1, -2, -1), (3, ...

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  9. The direction ratios of two lines AB, AC are 1, -1, -1 and 2, -1, 1. T...

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  10. If (a(1), b(1), c(1)), (a(2), b(2), c(2)) are d.r.'s of two perpendicu...

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  11. If (a(1), b(1), c(1)), (a(2), b(2), c(2)) are d.r.'s of two perpendicu...

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  12. If the direction cosines of any two lines are (-2/3, 1/3, 2/3), (3/5, ...

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  13. The angle between the lines whose direction cosines are (sqrt(3)//4, 1...

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  14. If P(2, 3, -6), Q(3, -4, 5) are two points, then anglePOQ is

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  15. If P = (0, 1, 2), Q = (4, -2, 1), O = (0, 0, 0) then anglePOQ=

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  16. The cosine of the angle A of the triangle with vertices A(1, -1, 2), B...

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  17. The angle between the lines passing through the points (8, 2, 0), (4, ...

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  18. The angle between the line passing through the points (3, 1, -2) and (...

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  19. If A(3, 4, 5), B(4, 6, 3), C(-1, 2, 4) and D(1, 0, 5) are such that th...

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  20. If the d.r.'s of two lines are (1, -1, 0) and (1, -2, 1) then the angl...

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