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Analytical Geometry

Blazing goIITian

Joined:	8 Feb 2007
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27 Oct 2007 03:16:19 IST

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484

3-D Geometry -Plzzzz helpp!!

None

A line through the origin makes angles , , with its projections on the coordinate planes which are rectangular, the distance of any point (x,y,z) from the line and its projections are d, a, b, c respectively.

Then prove that

d² = (a² -x²)cos² + (b² -x²) cos² + (c²-x²)cos²

I could do most of it, but am not reaching the exact answer. So plzz help me out guys!!!

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Comments (3)

Ramya Hegde

Blazing goIITian

Joined: 8 Feb 2007

Posts: 612

29 Oct 2007 03:01:06 IST

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Why cant anybody reply to any of my queries?? This is not fair!!!!

Ramya Hegde

Blazing goIITian

Joined: 8 Feb 2007

Posts: 612

31 Oct 2007 04:35:26 IST

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plz somebody take the trouble of trying it out. I'll rate u for sure, dont worry abt that.

Nadeem

Blazing goIITian

Joined: 25 Aug 2007

Posts: 521

31 Oct 2007 10:47:59 IST

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How can the distance of a point from a line be independent of its y and z coordinates?

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