http://www.johndcook.com/blog/2009/09/07/why-spherical-trigonometry/ The blog of John D. Cook Sat, 11 Feb 2012 01:10:06 -0500 http://wordpress.org/?v=2.8.4 hourly 1 http://www.johndcook.com/blog/2009/09/07/why-spherical-trigonometry/comment-page-1/#comment-36467 CogitoErgoCogitoSum Fri, 16 Apr 2010 04:07:29 +0000 http://www.johndcook.com/blog/?p=3051#comment-36467 This person may have granted you permission to quote them, but did they intend for you to also post their contact information? This person may have granted you permission to quote them, but did they intend for you to also post their contact information?

]]> http://www.johndcook.com/blog/2009/09/07/why-spherical-trigonometry/comment-page-1/#comment-29793 emghazal Tue, 29 Dec 2009 19:27:40 +0000 http://www.johndcook.com/blog/?p=3051#comment-29793 That is really interesting. It gave me some ideas.. These days, smartphones (iPhone, Android phones, etc..) already have all that's needed; They have accurate clocks, they can store all the charts needed, they have sensors to measure the angle they're tilted at, they have cameras to see the sun, and they can do millions of calculations per second. Someone should write an app for that. Yes, they also have GPS, but sometimes you don't have signal. It's also an interesting app to show to your friends. That is really interesting. It gave me some ideas.. These days, smartphones (iPhone, Android phones, etc..) already have all that’s needed; They have accurate clocks, they can store all the charts needed, they have sensors to measure the angle they’re tilted at, they have cameras to see the sun, and they can do millions of calculations per second. Someone should write an app for that.
Yes, they also have GPS, but sometimes you don’t have signal. It’s also an interesting app to show to your friends.

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