Direction vector of a line

  • Thread starter Nevermore
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  • #1
Nevermore
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How would I find the direction vector of a line given in the form ax + by + cz +d =0?

Thankyou.
 

Answers and Replies

  • #2
TD
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I see an equation of a plane, not a line.
 
  • #3
Nevermore
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Damn, sorry, got carried away with my letters. I meant ax + by +c = 0. Sorry about that...
 
  • #4
TD
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Nevermore said:
Damn, sorry, got carried away with my letters. I meant ax + by +c = 0. Sorry about that...
For a line, (1,m) is always a directional vector where m is the slope. Can you find the slope?
 
  • #5
Nevermore
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Yeah - I thought it would be something simple like that. Thanks for your help.
 
  • #6
TD
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You're welcome :smile:
 
  • #7
SirAllan
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Thanks for asking that Q, it helped me too
 
  • #8
Defennder
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I don't think there's a need to thank someone who started a thread two years ago and have not posted since.
 
  • #9
SirAllan
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LORL... Thanks for pointing that out. ( At least you still logon)
 

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