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May 18th, 2007, 09:35 AM  #1 
Newbie Joined: May 2007 Posts: 2 Thanks: 0  line computation questions 1. how do i compute the angle of the line from the origin? 2. how do i extend the line or make it longer?[/img] 
May 18th, 2007, 10:01 AM  #2  
Senior Member Joined: Dec 2006 Posts: 1,111 Thanks: 0  Quote:
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May 18th, 2007, 07:41 PM  #3  
Global Moderator Joined: Dec 2006 Posts: 20,919 Thanks: 2203  Re: line computation questions Quote:
 
May 18th, 2007, 08:02 PM  #4 
Newbie Joined: May 2007 Posts: 2 Thanks: 0 
ok.. sorry for my error there.. how do i compute for the angle that is relative to the xaxis or yaxis?

May 19th, 2007, 03:33 AM  #5 
Senior Member Joined: Nov 2006 From: I'm a figment of my own imagination :? Posts: 848 Thanks: 0 
The slope of a line, defined as (y_2y_1)/(x_2x_1) for any two points (x_1,y_1) and (x_2,y_2) on that line, is the tangent of the angle θ that that line makes with the xaxis and the cotangent of the angle it makes with the yaxis.


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