true anomaly

[nsg]

There is a formula that converts eccentric anomaly to true anomaly and vice versa:

\[\tan(\nu/2)=\sqrt{\frac{1+e}{1-e}}\tan(E/2)\]

I just noticed that \[\sqrt{\frac{1+e}{1-e}}=\exp(\tanh^{-1}(e))\] which could save some keystrokes (or precious program steps) on a calculator which has atanh function.

Also this is a rare opportunity to use that built in function that almost nobody ever uses.

[Geoff Quickfall]

Nice shortcut,


But I thought marriage did that!

[d b]

(04-07-2017 12:31 AM)Geoff Quickfall Wrote:  But I thought marriage did that!

Geoff; She probably always qualified, but I think that marriage granted your wife sainthood.