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The locus of x^(2)+y^(2)+z^(2)=0 is...

The locus of `x^(2)+y^(2)+z^(2)=0` is

A

(0,0,0)

B

a sphere

C

a circle

D

None of these

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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. The co-ordinates of the point which divides the line joining (2, 3, 4)...

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  2. The minimum distance of the point (1, 2, 3) from x-axis is

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  3. The locus of x^(2)+y^(2)+z^(2)=0 is

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  4. A parallelepiped is formed by planes drawn through the points P(6,8...

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  5. If alpha, beta, gamma be angles which a straighat line makes with the ...

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  6. A line line makes the same angle theta with each of the x and z-axes....

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  7. A line makes angles alpha,beta,gammaa n ddelta with the diagonals of a...

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  8. Which of the following triplets give the direction cosines of a line ?

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

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

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

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

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

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

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

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

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

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

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