October 20th, 2014, 10:15 PM  #1 
Member Joined: Sep 2014 From: Cambridge Posts: 64 Thanks: 4  Apparent angular diameter
You have a friend 6 feet high, who begins walking away from you at a rate of 5ft/sec. Write an expression relating their angular diameter "theta" to their distance "x". How do I approach this? 
October 21st, 2014, 04:48 AM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 3,045 Thanks: 1627  
October 21st, 2014, 05:58 AM  #3  
Member Joined: Sep 2014 From: Cambridge Posts: 64 Thanks: 4  Quote:  

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angular, apparent, diameter 
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