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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Emergency sun declination
From: Fred Hebard
Date: 2004 May 27, 09:25 -0400
From: Fred Hebard
Date: 2004 May 27, 09:25 -0400
On May 21, 2004, at 8:20 PM, Trevor J. Kenchington wrote: > Fred, > > For when you return from Maine: The point that you appear to be missing > is that Doug's #3 and #4 are not two sides of any triangle but two > distances measured along the same radius of a circle. > > > Trevor Kenchington > > > You wrote: > >> Trevor, >> >> I'm not sure what point it is I'm supposed to be missing, but Doug is >> finding the sine of 61 degrees by a graphical method while I was >> finding it using sine tables or a calculator or a Taylor series. A >> Taylor series is how the tables are calculated, and, I'm not sure of >> this one, but believe it to be correct, how the calculator evaluates >> it. The radius in Doug's method is the hypotenuse of the triangle and >> Doug's height is the opposite side, except he translates it to the >> y-axis to measure it. >> >> Off to Maine, so I'll be off-list for 5 days. > > > Previously, you wrote: > > >>> > A graphical method of computing the sine of a function. Sine is >>> > opposite over the hypotenuse. #3 =opposite, #4=hypotenuse. > > > -- > Trevor J. Kenchington PhD Gadus@iStar.ca > Gadus Associates, Office(902) 889-9250 > R.R.#1, Musquodoboit Harbour, Fax (902) 889-9251 > Nova Scotia B0J 2L0, CANADA Home (902) 889-3555 > > Science Serving the Fisheries > http://home.istar.ca/~gadus >