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You are not logged in. #1 20051121 06:45:58
Stuck on a difficult coordinate geomatry problem6(C) A line containg the point(2,4) has a slope of m which is not equal to zero. The line intercepts the xaxis at (x1,0) and the y axis at (0,y1) If x1 + y1=4m find the slopes of the two lines that satisfy this condition. Hence find the tangent of the acute angle between these two lines. #2 20051121 08:14:33
Re: Stuck on a difficult coordinate geomatry problemI think it is just a bunch of formulas to solve. "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #3 20051121 08:45:08
Re: Stuck on a difficult coordinate geomatry problemSomething seems worng as I checked the answer at the back of the book and the answers for m were supposed to be either 1 or 2 #4 20051121 08:48:05
Re: Stuck on a difficult coordinate geomatry problemSorry I see what was wrong I made a mistake when typing the question. I should have been x1 + y1=4 not x1 + y1=4m . Thanks for all your help though. Can your method still work with this equation? #5 20051121 16:59:32
Re: Stuck on a difficult coordinate geomatry problemHave a go ... copy and paste what I did and make the needed changes  I think you will still end up with a quadratic equation. Post your answer here so I can see. "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #6 20051122 04:19:45
Re: Stuck on a difficult coordinate geomatry problemAt (2,4): 4 = m(2) + c → c = 4+2m #7 20051122 08:58:01
Re: Stuck on a difficult coordinate geomatry problemAt (2,4): 4 = m(2) + b → b = 4+2m "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman 