Re: [HP-15C] A bit more of hyperbolic fcn... Message #7 Posted by Vieira, Luiz C. (Brazil) on 18 Sept 2004, 1:33 a.m., in response to message #6 by Karl Schneider
Hi Karl, guys;
Karl, thanks for mentioning the pages in the HP15C Owner's Handbook. To be honest, I had just the HP15C Owner's Handbook, Portuguese version in hands, and I know page numbers don't match English version, so I decided to mention the ADV FCN Handbook instead. ;-)
A few weeks ago I found this page when searching for Hyperbolic Functions and I kept a copy of it in my HD so I can use in the classroom. I felt its contents are condensed and complete, maybe it can be of help for any others in the need for concise info.
About the 'j' for engineers and 'i' for mathematicians when dealing with complex numbers: I've been curious about this for a long time when I was at the university and I simply forgot about that. Now I read your words and decided to ask again: do you have any idea about the use of different symbols? I used to think it was only to allow a unit being attached to a complex quantity (engineering) instead of using a 'pure' number (math) for that matter, but this is only a reasoning of mine.
Again, this is the kind of thread I like reading and posting about. Cheers.
Luiz (Brazil)
Edited: 18 Sept 2004, 1:40 a.m.
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