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March 24th, 2009, 12:19 AM  #1 
Newbie Joined: Mar 2009 Posts: 1 Thanks: 0  How to find the angle for a given point in a circle
Hi, How to find the angle for any given point in the circle. Thanks in advance. 
March 24th, 2009, 06:57 AM  #2 
Senior Member Joined: Mar 2009 Posts: 318 Thanks: 0 
Use the "inverse" trigfunction keys on your calculator...?

March 24th, 2009, 07:04 AM  #3 
Senior Member Joined: Sep 2008 Posts: 116 Thanks: 0  Re: How to find the angle for a given point in a circle
Are we talking about a coordinate point on a circle centered on the origin (0,0)? If so, then the angle represented by the one formed between a line drawn from the point to the origin with the xaxis is represented by: 
March 24th, 2009, 02:02 PM  #4  
Member Joined: Mar 2009 From: Asheville, NC Posts: 48 Thanks: 0  Re: How to find the angle for a given point in a circle Quote:
So you have your circle, with point (X,Y) and radius r. Put this point on a graph, and the distance from the center (0,0) to (X,Y) is r. This is your hypotenuse of the triangle. The distance X is your length, and your height Y is the height of your triangle.  

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