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Tim Wesserman or Edward Shore
03-15-2019, 10:44 PM (This post was last modified: 03-16-2019 12:15 PM by mathnovice.)
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Tim Wesserman or Edward Shore
I do ask this of 2 great minds? Here is the deal, I need to extend the function atan2(y,x). It is in FORTRAN and I have no idea about that. Attached is a function that with computational ease keeps track of coordinates on a sphere much faster than current computational times.

It is because of you 2 that I understood the programming language of HP Prime to define some functions. These functions were part of ancient trigonometry that is well studied and well behaved. It is a bit computationally heavy for humans, but if we allowed for billions of iterations a second, the best choice of methods is this for sure. Versin(x), EXESEC(x), and so on.....

The F is for Folium of Descartes. If I had never read you 2 I could have never answered the question "What is the derivative of CVCSIN(x)", why, "Because I want to know".

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Tim Wesserman or Edward Shore - mathnovice - 03-15-2019 10:44 PM
RE: Tim Wesserman or Edward Shore - JMB - 03-16-2019, 01:49 PM

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