Need help for some HP Prime calculus/functions - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: Need help for some HP Prime calculus/functions (/thread-14188.html) Pages: 1 2 Need help for some HP Prime calculus/functions - Devil69 - 12-18-2019 03:19 PM (sorry in advance if my english is bad, I'll try my best to explain my issue) Hi forum, I've received few days ago the HP prime G2 calculator and I'm really happy with that because it has almost all the functions I need. The problem is that I'm a newbie in graphic calculators and even after reading 600 pages of HP user guide I still can't solve 2 issues: - Solving trigonometrical inequations, I'm using the solve() function in CAS and have always the same problem: "Unable to find numeric values solving equation. For trigonometric equations this may be solved using asumptions, e.g. assume(x>-pi && x\frac12\) in CAS mode on the Prime, I do indeed get the error message given in your first post. But if I enter Code: assume(x>=-pi && x{\pi\over 6}\;{\rm and}\; x<{5\pi\over 6}\right\}\). It seems that when you are solving a trig inequality you must specify the range in which solutions must lie. You can't leave this unspecified, as you can for an equation. There is probably some good reason for this which I can't think of at the moment! Look up the commands assume, about, and purge in the manual or in the Help system for more information. Hope this helps! Nigel (UK) RE: Need help for some HP Prime calculus/functions - Devil69 - 12-22-2019 07:36 PM (12-22-2019 06:09 PM)Nigel (UK) Wrote:   (12-21-2019 01:39 AM)Devil69 Wrote:  ... Also nobody can help me with trig inequations? Thanks I'll have a go! If I try to solve (for example) $$\sin(x)>\frac12$$ in CAS mode on the Prime, I do indeed get the error message given in your first post. But if I enter Code: assume(x>=-pi && x{\pi\over 6}\;{\rm and}\; x<{5\pi\over 6}\right\}\). It seems that when you are solving a trig inequality you must specify the range in which solutions must lie. You can't leave this unspecified, as you can for an equation. There is probably some good reason for this which I can't think of at the moment! Look up the commands assume, about, and purge in the manual or in the Help system for more information. Hope this helps! Nigel (UK) Hi Nigel thank you very much I followed your instructions and it finally worked! I think HP should add the variable "k" for trig (in)equations in their future update to do these operations without assume() function so that the answer looks like this: x>π/6+2kπ and x<5π/6+2kπ, k∈ℤ RE: Need help for some HP Prime calculus/functions - toml_12953 - 12-22-2019 07:47 PM (12-20-2019 08:28 PM)Joe Horn Wrote:   (12-20-2019 01:22 PM)toml_12953 Wrote:  On my G2, I get this in Trig Explorer 3... There is no such app as "Trig Explorer 3". If you have one, you are either running a very old firmware version, or it's an artifact left over after upgrading your firmware. It's a ghost app, haunting your Prime. Ignore it; it's not supported any more. To exorcise it, upgrade your firmware and/or clear your Prime's memory and start fresh. (12-20-2019 01:29 PM)toml_12953 Wrote:  When I start Explorer on my G2, all I get is a list of types of graphs (Linear, Quadratic, Cubic, etc.) Correct. After selecting "Trigonometric", press the Plot key to see the Explorer / Trig in Plot view... as explained in the User Guide. 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? RE: Need help for some HP Prime calculus/functions - CyberAngel - 12-22-2019 09:49 PM (12-22-2019 07:47 PM)toml_12953 Wrote:   (12-20-2019 08:28 PM)Joe Horn Wrote:  There is no such app as "Trig Explorer 3". If you have one, you are either running a very old firmware version, or it's an artifact left over after upgrading your firmware. It's a ghost app, haunting your Prime. Ignore it; it's not supported any more. To exorcise it, upgrade your firmware and/or clear your Prime's memory and start fresh. Correct. After selecting "Trigonometric", press the Plot key to see the Explorer / Trig in Plot view... as explained in the User Guide. 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? Yes, yes you are--- ;-) RE: Need help for some HP Prime calculus/functions - Jacob Wall - 12-22-2019 10:02 PM (12-22-2019 04:20 PM)CyberAngel Wrote:  The hardware is nice and fast - yet I want a HP Prime + (with a SD 865) I would be happy with MicroSD, it's fast enough for everything else I need to do with it. Maybe exam mode could disable the extended memory.