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If a line has the direction ratios –18, ...

If a line has the direction ratios –18, 12, – 4, then what are its direction cosines ?

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The correct Answer is:
Hence, the direction cosines of a line are `(-9)/(11),(6)/(11),(-2)/(11)`.
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KUMAR PRAKASHAN-THREE DIMENSIONAL GEOMETRY-PRACTICE PAPER -11
  1. If a line has the direction ratios –18, 12, – 4, then what are its dir...

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  2. Find the direction cosines of a line which makes equal angles with the...

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  3. Find the direction cosines of the line passing through the two points ...

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  4. The foot of perpendicular drawn from the origin to the plane 2x + 3y +...

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  5. The plane 2x+3y+6z = 15 makes an angle of measure .........with Y-axis...

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  6. The symmetric from of the equation of the line x + y -z = 1 and 2x -3y...

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  7. A variable plane makes with the co-ordinates plane, tetrahedron of con...

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  8. Find the angle between the line (x+1)/(2)=y/3=(z-3)/(6) and the plane ...

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  9. Find the distance of the point (3,-2,1) from the plane 2x-y+2z + 3 = 0...

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  10. Find the values of p so that the lines (1-x)/(3)=(7y-14)/(2p)=(z-3...

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  11. Find the vector and the cartesian equations of the line that passes th...

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  12. Find the shortest distance between the lines (x+1)/(7)=(y+1)/(-6)=(...

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  13. Find the equation of the plane through the line of intersection of the...

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  14. Find the coordinates of the point where the line through (3,--4,-5) an...

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  15. Prove that the lines x=2 (y-1)/(3) = (z-2)/(1) and x = (y-1)/(1) = (z+...

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  16. A line makes the angle alpha, beta , gamma and delta with the diagonal...

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  17. Find the image of the point (1,3,4) in the plane 2x-y +z = -3.

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