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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Spherical Law of Cosines
From: Dan Allen
Date: 2002 Oct 27, 08:23 -0800
From: Dan Allen
Date: 2002 Oct 27, 08:23 -0800
On Saturday, October 26, 2002, at 07:10 AM, Trevor J. Kenchington wrote: > I think it is true that sin(90-a)=cos(a), making this form > ofthe alternate identical to the canonical version. Of course, provided > one is careful over using (e.g.) latitudes rather than co-latitudes > with > the alternate, you could forget about explicitly subtracting anything > from 90. But remembering the alternate version as a solution to the > spherical triangle could get you into serious confusion. Good clarifications. I agree. I just remember the canonical version and go from there. Dan
