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A straight line which makes an angle of ...

A straight line which makes an angle of `60^@` with each of Y and Z-axis, the angle this lines makes with X-axis is

A

45°

B

30°

C

75°

D

60°

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The correct Answer is:
A
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ML KHANNA-CO-ORDINATE GEOMETRY OF THREE DIMENSION-PROBLEM SET (1)
  1. Which of the following triplets give the direction cosines of a line ?

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  2. The points A(1,- 6,10), B(-1, -3,4), C(5, - 1,1) and D(7,-4,7) are the...

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  3. A straight line which makes an angle of 60^@ with each of Y and Z-axis...

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  4. If a line makes an angle (pi)/(4) with the positive directions of each...

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  5. A line passes through the point (6, -7, -1) and (2, -3, 1). The direct...

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  6. If P is a point in space such that OP is inclined to OX at 45^(@) and ...

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  7. The projections of a line segment on the coordinate axes are 12,4,3 re...

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  8. The direction cosines of the line joining the points (4,3,-5) and (-2,...

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  9. If (a,b,c) and (a^('),b^('),c^(') ) are the direction ratios of two pe...

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  10. If A(6,3,2), B(5,1,4), C(3,-4,7), D(0,2,5) be from points, the project...

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  11. The angle between the lines whose direction ratios are 1,1,2,sqrt3-1,-...

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  12. The angle between the lines 2x=3y=-z and 6x=-y=-4z is

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  13. Find the angle between the lines whose direction cosines are connec...

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  14. Three lines with direction cosines (1,1,2),(sqrt(3)-1,-sqrt(3)-1,4), (...

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  15. The co-ordinates of a point P are (3, 12, 4) with respect to origin O,...

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  16. The vertices of a triangle ABC are A(-1,2,-3),B(5,0,-6),C(0,4,-1). The...

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  17. The vertices of a triangles ABC are A(-1,2,-3),B(5,0,-6),C(0,4,-1).The...

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  18. The cosine of the angle between any two diagonals of a cube is

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  19. The direction rations of the diagonals of a cube which joins the origi...

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  20. In three dimensional geometry ax+by+c=0 represents (A) a plane perpend...

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