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If a line makes angles of 90^@,60^@ and ...

If a line makes angles of `90^@,60^@ and 30^@` with the positive x, y and z axis respectively, find its direction-cosines.

A

`lt0,1/2,sqrt3/2gt`

B

`lt1,1/2,sqrt3/2gt`

C

`lt0,-1/2,sqrt3/2gt`

D

none of these

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MODERN PUBLICATION-Three Dimensional Geometry-EXERCISE
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  2. Distance between the point (0,1,7) and the plane 3x+4y+1=0 is:

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  3. If a line makes angles of 90^@,60^@ and 30^@ with the positive x, y an...

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  4. If a line passes through two points (-2,4,-5) and (1,2,3), then its di...

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  5. The direction cosines of the line whose direction ratios are 6,-2,3 :

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  6. The direction cosines of the line joining the points (-2,1,-8) and (4,...

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  12. The distance of the point (2,1,-1) from the plane x-2y+4z=9 is :

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  13. If the line (x-4)/(1)=(y-2)/(1)=(z-k)/(2) lies exactly on the plane 2x...

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  14. The point which lies in the plane given by the equations 2x+y-3z=10 is...

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  15. The angle between two planes : 3x-6y+2z=7 and 2x+2y-2z=5 is :

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  16. Direction cosines of the normal to the plane: 2x-3y+4z-6=0 are :

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  17. If a vector makes angles alpha, beta, gamma with x, y and z axes respe...

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  18. If a line makes angles of 90^@,60^@ and 30^@ with the positive x, y an...

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

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