Need help for some HP Prime calculus/functions

12222019, 11:53 PM
Post: #21




RE: Need help for some HP Prime calculus/functions
(12222019 09:49 PM)CyberAngel Wrote:(12222019 07:47 PM)toml_12953 Wrote: All of my Primes (HW A, two HW C (old and new keyboard) and D) had Trig Explorer 2 and 3 on them. I deleted all of them. Am I the only one who ended up with multiple Explorers? Good! I feel so special! Tom L Cui bono? 

12232019, 10:06 AM
Post: #22




RE: Need help for some HP Prime calculus/functions
(12222019 07:36 PM)Devil69 Wrote: Hi Nigel thank you very much I followed your instructions and it finally worked! Glad to help. I agree with you about including an integer in the solution. The strange thing is that the Prime already does this when solving trigonometric equations: try solving \(\sin(x)=\frac12\), with "Principal" unticked in the CAS settings. So the mechanism is there, but for some reason it isn't applied to inequalities. Nigel (UK) 

12232019, 09:30 PM
Post: #23




RE: Need help for some HP Prime calculus/functions
(12232019 10:06 AM)Nigel (UK) Wrote:(12222019 07:36 PM)Devil69 Wrote: Hi Nigel thank you very much I followed your instructions and it finally worked! After unticking Pricipal in CAS settings and trying to solve \(\sin(x)=\frac12\), I have this result: (12*n_24*π+π)/6, (12*n_24*π+5*π)/6, what does mean 12*n_24*π ? Thanks 

12242019, 07:30 AM
Post: #24




RE: Need help for some HP Prime calculus/functions
12*k*pi
Best, Aries 

12242019, 12:03 PM
Post: #25




RE: Need help for some HP Prime calculus/functions
(12232019 09:30 PM)Devil69 Wrote:(12232019 10:06 AM)Nigel (UK) Wrote: Glad to help. I agree with you about including an integer in the solution. The strange thing is that the Prime already does this when solving trigonometric equations: try solving \(\sin(x)=\frac12\), with "Principal" unticked in the CAS settings. So the mechanism is there, but for some reason it isn't applied to inequalities. n_24 is an arbitrary integer. If you run the command again you should get n_25 in the answer, and so on. This is better than using n or c or k, as these are common variable names which might already be in use elsewhere. Nigel (UK) 

12242019, 03:53 PM
Post: #26




RE: Need help for some HP Prime calculus/functions
(12242019 07:30 AM)Aries Wrote: 12*k*pi Quote: n_24 is an arbitrary integer. If you run the command again you should get n_25 in the answer, and so on. This is better than using n or c or k, as these are common variable names which might already be in use elsewhere. Alright then thanks for your help guys and have a nice Xmas Eve! 

12252019, 08:38 AM
Post: #27




RE: Need help for some HP Prime calculus/functions
(12242019 03:53 PM)Devil69 Wrote:(12242019 07:30 AM)Aries Wrote: 12*k*pi Happy XMas to you too and everyone ! Best, Aries 

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