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The direction cosines of the normal to t...

The direction cosines of the normal to the plane 2x-2y+z-1 =0 are

A

`2/sqrt3, - 2/sqrt3, 1/sqrt3`

B

`2/3 , -2/3 , 1/3`

C

`2/3,2/3,-1/sqrt3`

D

`-2/sqrt3, 2/sqrt3, 1/sqrt3`

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The correct Answer is:
B
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HIMALAYA PUBLICATION-THREE DIMENSIONAL GEOMETRY-QUESTION BANK
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  5. A plane meets the coordinate axes at A, B, C such that the centroid of...

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  12. The foot of the perpendicular from (-2,3) to the line 2 x-y-3=0 is

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  13. The image of the point (- 1, 3, 4) in the plane: x-2y=0 is:

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  14. Find the image of (2,3) on the line 3x+5y=4.

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  15. If the planes vec r . (2i + lambda j +k) = 3 and vec r . (4i+j+muk) = ...

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  19. The perpendicular distance of P(1,2,3) from the line (x-6)/3 = (y-7)/2...

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