December 27th, 2012, 03:13 PM  #1 
Member Joined: Oct 2012 Posts: 56 Thanks: 0  angles
I was looking at methods of measuring pi arbitrarily and found this gem. I thought to myself, hey that 239 sure looks familiar. I didn't understand that 4 in 4arctan(1/5) so I did the double angle thing twice on it. Oh, yeah, I know where that came from now. Time to do the angle addition formula. So, I guess this means there are infinite solutions just like this one for measuring pi. Lots of 2arctans there, but I think there is only 1 4arctan. I've tried about 50 of the sequences just now. Maybe I'll have better luck if I tackle the 30/60 
December 28th, 2012, 03:07 PM  #2 
Member Joined: Oct 2012 Posts: 56 Thanks: 0  Re: angles
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December 28th, 2012, 04:04 PM  #3 
Member Joined: Oct 2012 Posts: 56 Thanks: 0  Re: angles
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