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A line makes angles 45^@ and 60^@ with t...

A line makes angles `45^@ and 60^@` with the positive direction of the axis of x and y makes with the positive direction of z axis, an angle of:

A

`60^@`

B

`120^@`

C

`60^@ and 120^@`

D

none of these

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MODERN PUBLICATION-Three Dimensional Geometry-EXERCISE
  1. Direction casines of z-axis are

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  2. If a line has direction ratios <2,-1,-2>, then what are its direction ...

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  3. A line makes angles 45^@ and 60^@ with the positive direction of the a...

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  4. Equation of line passing through the point (2,3,1) and parallel to the...

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  5. If the direction cosines of a vector of magnitude 3 are <2/3, -a/3, 2/...

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  6. Equation of line passing through the point (2,3,1) and parallel to the...

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  7. A unit vector parallel to the straight line: (x-2)/3=(3+y)/-1=(z-2)/-4...

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  8. The angle between a normal to the plane : 2x-y+2z-1=0 and the z axis i...

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  9. Find the coordinates of the Foot of the perpendicular drawn from the ...

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  10. The distance between the x axis and the point (3,12,5) is :

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  11. The shortest distance of the point (a,b,c) from the x-axis is

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  12. Equation of the plane perpendicular to the line x/1=y/2=z/3 and passin...

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  13. The line (x-2)/3=(y-3)/4=(z-4)/5 is parallel to the plane:

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  14. Prove that the angle between any two diagonals of a cube is cos^-1frac...

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  15. The line passing through the points (5, 1, a) and (3, b, 1) crosses th...

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  16. If the straight lines : (x-1)/k=(y-2)/2=(z-3)/3 and (x-2)/3=(y-3)/k=(z...

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  17. Let P(3, 2, 6) be a point in space and Q be a point on the line r=(ha...

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  18. A line with positive direction cosines passes through the pint P(2,-1,...

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  19. Let the line (x-2)/(3)=(y-1)/(-5)=(z+2)/(2) lies in the plane x+3y-alp...

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

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