How to find "inverses?"  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: How to find "inverses?" (/thread128849.html) 
How to find "inverses?"  PhysicsNerd  11262007 How do you find inverses? (the one where you swap x and y and solve for y) I've looked through the manual and it says to press the button 1/x but isn't that only the reciprocal?
Re: How to find "inverses?"  Vieira, Luiz C. (Brazil)  11262007 Hi; just want to help, and would like to know:
1  which calculator are you using? The second question of mine is mainly to understand what do you mean by swap x and y and solve for y. Cheers.
Luiz (Brazil)
Re: How to find "inverses?"  PhysicsNerd  11262007 Oh, my bad; I'm using an hp50g. I would like to graph the inverse of x^2 or abs(x). I would also like to find the inverse of sec (x), with x being any real number within the domain of sec.
y=x^2
the inverse would be g(x)= +/ sqrt(x) Edited: 26 Nov 2007, 12:26 a.m.
Re: How to find "inverses?"  Tim Wessman  11262007 Make a little program like this. If I am understanding correctly, that is how I did it back in high school. It won't work for some functions though. << 'X' ISOL 'Y=A' SUBST 'X=Y' SUBST 'A=X' SUBST >>
TW
Re: How to find "inverses?"  PhysicsNerd  11282007 Are you telling me that the hp50g doesn't have a builtin button for finding inverses? Unfortunately, I don't know how to program. =/
Re: How to find "inverses?"  Walter B  11282007 Fortunately, this is an opportunity for you to start learning ;)
Re: How to find "inverses?"  Ed Look  11282007 What calculator does?? I agree, you'll have to write the program yourself. And just start with the manual just to get your feet wet; then try to obtain a copy of the HP 48G Advanced User's Reference guide. It should be still available in book form from Calcpro.com for about thirty bucks or so. I believe also it's available on Eric Reichlin's HP48 site in the download section electronically as a .pdf file. This manual is very worthwhile. I was able to use it to get myself to a point at which I can begin to believe I can program almost anything, given reasonable time and maybe a few days more, on a HP48G series or 49G series machine, which does include the HP50g. One caveat: I did learn to program back in high school and college, even if that was back just shortly after stone tablets got obsolete, HP programmable scientific calculators and a "real" computer language. But if as you say you don't know how to program, then I would strongly recommend you start with the 50g manual, then get that AUR I mentioned in this message.
Edited: 28 Nov 2007, 10:20 a.m.
Save your time. PhysicsNerd has refused to read the manuals for 6 months  Allen  11282007 Ed, Walter, Tim:
For reference to this hilarity see threads:
Re: Save your time. PhysicsNerd has refused to read the manuals for 6 months  Giancarlo (Italy)  11282007 Hi Allen.
Quote: ...so elegant and short that I've just typed and saved it both into the emulator and into the real thing! Thanks to the contributors. Best regards. Giancarlo Re: Save your time. PhysicsNerd has refused to read the manuals for 6 months  Chris Dean  11282007 I think PhysicsNerd is just trying to wind up well intentioned respondents to his questions. Edited: 28 Nov 2007, 1:18 p.m.
This is a classic answer  ArturBrazil  11282007 Congratulations, Luiz What a solution!!!!
Cheers, Artur
