 My Math Forum Problem involving a unit circle and two other coordinates
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April 3rd, 2019, 12:44 PM   #11
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 Originally Posted by R4tt3xx What if A was at any location within the circle of radius 1 ? Sorry for asking another question...
Find the equation for line AB and determine its intersection with the unit circle. April 3rd, 2019, 01:08 PM   #12
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 Originally Posted by skeeter Find the equation for line AB and determine its intersection with the unit circle.
Yes exactly how do I do that ? What web resources are out there that I can look at ?

Thanks Again. April 3rd, 2019, 01:13 PM #13 Senior Member   Joined: Feb 2016 From: Australia Posts: 1,838 Thanks: 653 Math Focus: Yet to find out. Thanks from topsquark April 3rd, 2019, 03:49 PM #14 Global Moderator   Joined: Dec 2006 Posts: 20,978 Thanks: 2229 Using (x, y) Cartesian coordinates for A and B, if these points have different x-coordinates, the line through A and B has equation y = mx + c, where m and c are values determined from the coordinates of A and B. The above-mentioned circle of radius 1 has equation x² + y²= 1. To find where the circle and line intersect, substitute mx + c for y in the equation of the circle and solve the resulting equation for x. That will give 2 possible values for the x-coordinate of the point of intersection. Only one of these values will lie between the x-coordinate values of the points A and B. Tags circle, coordinates, involving, problem, unit Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post Volle Physics 2 July 5th, 2016 12:52 PM doryyroryy Pre-Calculus 1 November 15th, 2014 04:18 AM Aiyla Algebra 1 February 14th, 2012 12:48 AM brunojo Algebra 0 March 20th, 2009 04:50 PM Nate Algebra 1 December 25th, 2008 02:16 PM

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