In the date at the bottom of my post, I mistakenly said "48 M, November
18th", but the correct Greenwich date of course was and is:
48 Tu
November 19th
Michael Ossipoff
On Mon, Nov 18, 2019 at 7:42 PM Michael Ossipoff
wrote:
> First, an omission in my post about the trig-at-the-dial derivation
First, an omission in my post about the trig-at-the-dial derivation:
.
I should have said that, by the definition of the cosine:
.
NE = NP/cos h.
.
--
.
Yes, the thing is that all of the declination-line calculations and
explanations that we've discussed here require telling the per
