Calculators topics
http://h30499.www3.hp.com/t5/Calculators/bd-p/bsc-408
Calculators topicsSun, 28 Dec 2014 20:19:24 GMTbsc-4082014-12-28T20:19:24ZSimplify trig ecuations and trig matrix. And isolate variables
http://h30499.www3.hp.com/t5/Calculators/Simplify-trig-ecuations-and-trig-matrix-And-isolate-variables/m-p/6688335#M14986
<P>Hello everyone. Thanks for your help in advance.</P><P> </P><P>Im new with HP 50g and im having some problems.</P><P> </P><P>Whats the best way to simplify trig ecuations and matrix with trig terms?</P><P> </P><P>For example, i tryied to simplify cos(Q1+pi/2) but it gives me cos((pi+2*Q1)/2) when it should be -sin(Q1) (checked with wolfram)</P><P> </P><P>After this, i would like to simplify some matrix with terms like the cos(Q1+pi/2). It is possible or i can only simplify equations?</P><P> </P><P>And for the last. Imagine i have something like the picture attached. I need to isolate q2.</P><P>T2 is tan(q2), S3 is sin(q3), etc, with q2,q3 rads, but i dont need the value, i need it symbolic.</P><P>A,B,l3,l2 are constants.</P><P> </P><P> </P><P> Thank you very much</P><P> </P>Sat, 27 Dec 2014 19:45:33 GMThttp://h30499.www3.hp.com/t5/Calculators/Simplify-trig-ecuations-and-trig-matrix-And-isolate-variables/m-p/6688335#M14986e270889o2014-12-27T19:45:33ZPrime Connectivity Kit within a Windows XP VM?
http://h30499.www3.hp.com/t5/Calculators/Prime-Connectivity-Kit-within-a-Windows-XP-VM/m-p/6688050#M14983
<P>I recently <U>upgraded</U> my HP laptop (Pavilion g7) from Windows 8.1 to LinuxMint 17.1 (and there is a significant improvement in speed/efficiency).</P><P> </P><P>Since HP does not provide the connectivity kit for Linux (??!!!), I am having to resort to creating a virtual machine to try. So I set up a WIndows XP VM in VirualBox, which has the latest XP updates (SP3, etc). I would have tried a Windows 8.1 VM, however, HP does not provide the install disks but only recovery disks for the laptop. So I can't create a VM for Win 8 (I tried). But I did have a licensed copy of XP.</P><P> </P><P>Now in the XP VM, I try to install the HP Prime Connectivity Kit from the CD that came with my Prime calculator (circa August 2013). I figured I could just update it after installed. It installs but then when I try to execute the program, I get:</P><P><IMG title="HPconnkit.jpg" alt="HPconnkit.jpg" border="0" src="http://h30499.www3.hp.com/t5/image/serverpage/image-id/55908iFEA33FD9AB18AD3E/image-size/large?v=mpbl-1&px=-1" /></P><P> I did try to reinstall the program a few times but with the same result (you know what they say about insanity).</P><P> </P><P>Is there a trick, if it is even possible, to run the connectivity kit within an XP VM to access a real calculator?</P><P>(It would sure save a lot of hassle if HP would just support Linux).</P><P> </P><P>I did get the companion virtual calculator to install, run and even update [note: a virtual calculator within a virtual machine -- hopefully life is not virtual (aka the Matrix)].</P><P> </P><P> </P><P> </P><P> </P>Wed, 24 Dec 2014 23:53:58 GMThttp://h30499.www3.hp.com/t5/Calculators/Prime-Connectivity-Kit-within-a-Windows-XP-VM/m-p/6688050#M14983davetheguru2014-12-24T23:53:58ZHP Prime differentiation problem
http://h30499.www3.hp.com/t5/Calculators/HP-Prime-differentiation-problem/m-p/6686752#M14977
<P>Hello everyone,</P><P> </P><P>I have a problem with a differentiation and I don't know what I'm doing wrong. I want do differentiate the function like in the picture, with a variable O, but in the answer there is no variable O anymore. I tried it in 2 different ways, but I must be doing something wrong.</P><P> </P><P>Could someone tell me what I'm doing wrong? Are both ways that I tried totally wrong?</P><P> </P><P>Thank you in advance for helping me.</P><P> </P><P>Kind regards</P><P> </P><P>Xavier</P>Fri, 19 Dec 2014 14:50:25 GMThttp://h30499.www3.hp.com/t5/Calculators/HP-Prime-differentiation-problem/m-p/6686752#M14977vdh-xavier2014-12-19T14:50:25ZThe new update does not restore backup Personal:
http://h30499.www3.hp.com/t5/Calculators/The-new-update-does-not-restore-backup-Personal/m-p/6686728#M14976
<P>Friends:</P><P> </P><P>After updating the "HP_Prime_Virtual_Calculator_2014_12_03", "HP_Prime_Connectivity_Kit_20141203" and "HP_Prime_Calculator_Firmware_20141203" Windows shuts down when I try to restore a backup to the emulator or the calculator.</P><P> </P><P>Can anyone help? Use Windows 8.1.</P><P> </P><P>Thank You</P><P>David</P>Fri, 19 Dec 2014 12:12:39 GMThttp://h30499.www3.hp.com/t5/Calculators/The-new-update-does-not-restore-backup-Personal/m-p/6686728#M14976Davidro2014-12-19T12:12:39Zhp Prime Solver issue (bug??)
http://h30499.www3.hp.com/t5/Calculators/hp-Prime-Solver-issue-bug/m-p/6685285#M14970
<P>solve(r=f^(a-LN(f)),f)</P><P> </P><P>correctly gives the solution f=e^(quad formula)</P><P> </P><P>BUT, if i replace the 'a' in the above with any number between 0 and 1, for example, solve(r=f^(0,5-LN(f)),f), it gives an incorrect answer.</P><P> </P><P>What it does is replace the 1/2 power within the quadratic formula, with a 1/2 multiple instead - ie. instead of</P><P> </P><P>e^(b<FONT face="andale mono,times">+</FONT>(c)<STRONG>^</STRONG>(1/2)) (correct answer),</P><P> </P><P>it gives</P><P> </P><P>e^(b+(c)<STRONG>*</STRONG>(1/2)) (it simplifies this quite a lot - down to something like d*r for some d - and it took me a long time to work out that this is what it is doing!!)</P><P> </P><P>is this a bug with the solve command or am I just doing it wrong???</P><P> </P><P> </P><P>I have noticed a similar problem when solving 2nd order DE's. When simplifying a solution (using the 'simplif' softkey), it sometimes changes things like e^(x*3) into e^(x^3). Unfortunately I haven't a simple example of this one yet!</P><P> </P>Mon, 15 Dec 2014 22:09:18 GMThttp://h30499.www3.hp.com/t5/Calculators/hp-Prime-Solver-issue-bug/m-p/6685285#M14970Mmmm--2014-12-15T22:09:18ZHP 50G can't solve a simple logarithm inequality?!
http://h30499.www3.hp.com/t5/Calculators/HP-50G-can-t-solve-a-simple-logarithm-inequality/m-p/6682331#M14963
<P>Hi there,</P><P>I've just bougth a new HP 50G. It's fantastic but I can't understand why if I type those inequalities it can't solve:</P><P>1st attempt: Log(x)>5 --->Error: Not reducible to a rational expression... very strange it is trivial!</P><P>2nd attempt: after applying EXPLN my inequality became LN(x)/LN(10)>5 ----> Error: Parameters not allowed (wtf! I can't see any parameter)</P><P>3rd attempt: I've rewritten my inequality to LN(x)>5*LN(10) ---> Error: Parameters not allowed.</P><P> </P><P>The only way it seems to solve it is evaluating ln10...losing the exact mode...obviously in this case it's trivial but if I'll need to solve any other more complex inequality how should I do?</P>Mon, 08 Dec 2014 12:20:38 GMThttp://h30499.www3.hp.com/t5/Calculators/HP-50G-can-t-solve-a-simple-logarithm-inequality/m-p/6682331#M14963floydish2014-12-08T12:20:38ZHP Prime Integration Bug?
http://h30499.www3.hp.com/t5/Calculators/HP-Prime-Integration-Bug/m-p/6681796#M14958
<P>Attempted simple integration by trying to get volume of a torus by revoling circle around y axis.</P><P> </P><P>Distance center circle from origin R and radius r using slices. Standard simple calc problem often given to students. Works OK on HP50 and TI-89. Tried it on Prime, latest firmware using pretty print entry template for definite integral.</P><P>Integrate from R-r to R+r.</P><P>Using equation 4*pi*x*sqrt(r^2-(x-R)^2) dx</P><P>should get you 2*pi^2*r^2*R.</P><P> </P><P>Prime gets you: "Unable to check if antiderivative gibberish characters (rA^2 talor x 3A more gibberish has singular points for definite integration in [-r,r]"</P>Sat, 06 Dec 2014 03:46:47 GMThttp://h30499.www3.hp.com/t5/Calculators/HP-Prime-Integration-Bug/m-p/6681796#M14958GregP12014-12-06T03:46:47ZMarking variable as real in HP Prime CAS
http://h30499.www3.hp.com/t5/Calculators/Marking-variable-as-real-in-HP-Prime-CAS/m-p/6680819#M14956
<P>I don't know if there is a solution to this problem, but it would be nice if there were.</P><P> </P><P>Yesterday I was doing some homework and I was asked to determine the magnitude of a transfer function that looked something like this (there were more variables in the contants, so a would be something like "r*c" or someting like that):</P><P> </P><P>H(jw)=(a*j*w)/(a*(j*w)^2+b*j*w+1)</P><P> </P><P>(Note: j = i = \sqrt{-1})</P><P> </P><P>The actual equation (which I can't remember now) had about 6 variables.</P><P> </P><P>I can do this manually, but I thought it would be nice to try to eliminate errors and use my calculator. I attempted to find the magnitude by taking the absolute value of the right side of the above equation. What I got back was technically correct, but was littered with RE{} and IM{} statements and was extremely large, making it useless for recording on my homework. Apparently the HP Prime had been extremely thorough and assumed my "constants" were also complex when in reality every variable in my equation should have had a real value (since the i was already included).</P><P> </P><P>I had no way of actually computing the constant values since it was a symbolic problem, so I ended up doing the simplification manually.</P><P> </P><P>My question is: Is there some way to tell the solver that "yes, this is a complex equation, but these variables will always have real values?" My CAS settings have both the Complex and i boxes checked.</P>Wed, 03 Dec 2014 15:43:19 GMThttp://h30499.www3.hp.com/t5/Calculators/Marking-variable-as-real-in-HP-Prime-CAS/m-p/6680819#M14956losfrijoles2014-12-03T15:43:19ZProblems sending data between the calculator and the emulator.
http://h30499.www3.hp.com/t5/Calculators/Problems-sending-data-between-the-calculator-and-the-emulator/m-p/6680289#M14953
<P>I can't send anything to the Calculator Emulator. Does not appear in the Send button calculator. In the emulator, it appears that key send as soon as I connect with the calculator and can send data to it. There is command of testicles EU can do to make sure a machine is working well, for example, the USB driver? </P><P>Made, including updates, firmware:</P><P>version of the application: 20140702v6031</P><P> operating system version: V 0.032.6030</P><P>version of the program: 201472 (6031)</P><P>the most: I received the calculator yesterday, day 1. and I doesn't seem to work well. There is a channel for warranty support you can contact? </P><P>Grateful</P><P>Davi</P>Tue, 02 Dec 2014 15:46:51 GMThttp://h30499.www3.hp.com/t5/Calculators/Problems-sending-data-between-the-calculator-and-the-emulator/m-p/6680289#M14953Davidro2014-12-02T15:46:51ZDefinite Integral of Matrix (50g)
http://h30499.www3.hp.com/t5/Calculators/Definite-Integral-of-Matrix-50g/m-p/6677014#M14946
<P>Hello</P><P> </P><P>Integrating an matrix with INTVX works well.</P><P> </P><P>Is there also a way to calculate definite integrals (e.g. I want to integrate all matrice components with x going from 0 to 1)?</P><P> </P><P>Regards</P>Mon, 24 Nov 2014 08:48:19 GMThttp://h30499.www3.hp.com/t5/Calculators/Definite-Integral-of-Matrix-50g/m-p/6677014#M14946Teleboy2014-11-24T08:48:19Zsolve for variable problem (prime emulator)
http://h30499.www3.hp.com/t5/Calculators/solve-for-variable-problem-prime-emulator/m-p/6676788#M14944
<P>I have an equation that I've entered into the prime emulator and would like to solve for a variable. I am able to make it work when I put in values for each variable and leave one blank. It solves for the missing variable fine in that case. What I would like to do is solve the equation for a variable when none of the variables have a value. I would expect that it would re-arrange the equation for the variable I call out like it does on my ti89 titanium. Instead I just get a set of brackets in the answer {}.</P><P>The equation is:</P><P> </P><P>diffImpedance=2*((80/√relativeEr)*(ln((1.9*(2*heightSmaller+cuThickness))/(0.8*diffTrace+cuThickness)))*(1-heightSmaller/(4*heightLarger)))*(1-0.374*e^((-2.9*(diffSpace/heightOverall))))</P><P> </P><P>I put in all the variables as user variables and then store the equation in E0.</P><P>Then I do : solve(E0,diffSpace)</P><P>and the answer I get are the brackets. I've tried it with more basic formulas and it's the same. Am I doing something wrong?</P><P> </P><P>Thanks</P><P> </P><P> </P><P> </P>Sun, 23 Nov 2014 23:53:18 GMThttp://h30499.www3.hp.com/t5/Calculators/solve-for-variable-problem-prime-emulator/m-p/6676788#M14944Dan-N2014-11-23T23:53:18ZHP Prime : Stock a formula with a variable and use it later with different values for the variable
http://h30499.www3.hp.com/t5/Calculators/HP-Prime-Stock-a-formula-with-a-variable-and-use-it-later-with/m-p/6676554#M14938
<P>Hello everyone,</P><P> </P><P>I want to know how I can save a formula with one or more variables and then use this formula later with putting a value for one variable. The reason I want this is that I want to be able to use the formula by putting several values for my variable, without having to change the value of the variable everytime at every place it is pesent in the forumla.</P><P> </P><P>I hope my English is not too bad and that my question is more or less undestandable.</P><P> </P><P>Thank you in advance for your help.</P><P> </P><P>Kind regards</P><P> </P><P>Xavier</P>Sun, 23 Nov 2014 02:32:36 GMThttp://h30499.www3.hp.com/t5/Calculators/HP-Prime-Stock-a-formula-with-a-variable-and-use-it-later-with/m-p/6676554#M14938vdh-xavier2014-11-23T02:32:36ZHP Prime differentiation problem
http://h30499.www3.hp.com/t5/Calculators/HP-Prime-differentiation-problem/m-p/6676553#M14937
<P>Hello everyone,</P><P> </P><P>I have a problem with a differentiation and I don't know what I'm doing wrong. I want do differentiate the function like in the picture, with a variable O, but in the answer there is no variable O anymore. I tried it in 2 different ways, but I must be doing something wrong.</P><P> </P><P>Could someone tell me what I'm doing wrong? Are both ways that I tried totally wrong?</P><P> </P><P>Thank you in advance for helping me.</P><P> </P><P>Kind regards</P><P> </P><P>Xavier</P><P> </P><P> </P>Sun, 23 Nov 2014 02:26:15 GMThttp://h30499.www3.hp.com/t5/Calculators/HP-Prime-differentiation-problem/m-p/6676553#M14937vdh-xavier2014-11-23T02:26:15ZHow to solve this problem
http://h30499.www3.hp.com/t5/Calculators/How-to-solve-this-problem/m-p/6676512#M14934
<P>How do I solve this on the HP Prime: <IMG title="radsolve.gif" alt="radsolve.gif" src="http://h30499.www3.hp.com/t5/image/serverpage/image-id/55241iA0F7B4588FA75059/image-size/original?v=mpbl-1&px=-1" border="0" /></P><P> </P><P>I try to type it in exactly like you see it, and the I press the tool box button, select 3 to bring up the solver, then press 1, then I arrow up to select the problem and press enter. The solution box comes back as [[]] but I think that's wrong. When I do it on paper I get w = 140 which I think is right. 15 - 140 = -125. The third root of -125 is -5. -5 + 7 is 2. It works. So why does the calculator say the solution set is empty?</P>Sat, 22 Nov 2014 23:03:04 GMThttp://h30499.www3.hp.com/t5/Calculators/How-to-solve-this-problem/m-p/6676512#M14934blixel2014-11-22T23:03:04Zprime emulator variables length
http://h30499.www3.hp.com/t5/Calculators/prime-emulator-variables-length/m-p/6676482#M14933
<P>While using the prime emulator "solve numeric function" I noticed my veriable names were being cut-off after 4 characters. Is there a way to see all of the variable name? Or am I limited to just 4 characters?</P><P>Thanks</P><P> </P><P> </P><P><IMG alt="variables" src="C:\Users\dnicholson\Documents\Invincea Downloads\variables.jpg" border="0" /> </P>Sat, 22 Nov 2014 13:28:06 GMThttp://h30499.www3.hp.com/t5/Calculators/prime-emulator-variables-length/m-p/6676482#M14933Dan-N2014-11-22T13:28:06ZHP Prime nagative angle
http://h30499.www3.hp.com/t5/Calculators/HP-Prime-nagative-angle/m-p/6676282#M14929
<P>Hi, I' using HP Prime (Application version: 20140702 v6031, Operating system version: V0.032.6030)<BR />when I 'm in the Home View(Angle Measure: Degrees) and enter for example -0.2535241 and want to convert it in DMS (using decimal to sexagesimal conversion key) I get this 0°15'12.68676"<SPAN> without a minus</SPAN>. This is only problem when the angle is negative and it has 0°.<BR />Is this a bug?</P>Fri, 21 Nov 2014 13:52:40 GMThttp://h30499.www3.hp.com/t5/Calculators/HP-Prime-nagative-angle/m-p/6676282#M14929unigraph2014-11-21T13:52:40ZNon rounded decimal value
http://h30499.www3.hp.com/t5/Calculators/Non-rounded-decimal-value/m-p/6676096#M14927
<P>How do I get the HP Prime to show me the non rounded decimal value of: <IMG title="rad.gif" alt="rad.gif" src="http://h30499.www3.hp.com/t5/image/serverpage/image-id/55198i527E09CDC40D5BDF/image-size/original?v=mpbl-1&px=-1" border="0" /></P><P> </P><P>It shows me -0.31 but I need to see at least 4 decimal places.</P>Fri, 21 Nov 2014 03:23:17 GMThttp://h30499.www3.hp.com/t5/Calculators/Non-rounded-decimal-value/m-p/6676096#M14927blixel2014-11-21T03:23:17ZDirection field plot
http://h30499.www3.hp.com/t5/Calculators/Direction-field-plot/m-p/6673344#M14923
<P>For ploting vector fields of differential equations I've used slopefield so far. How can I plot the system of two DE with the 50g (In Maple dfieldplot is used for this)?</P><P> </P><P>I've tried {'-x+y+1' 'x+y-3'} so far for plotting the functions x'=-x+y+1, y'=x+y-3. The calc plots something which isn't the same as Maple does. There should be a critical point at (2,1) from which solutions move away:</P><P> </P><P><IMG title="Capture.PNG" alt="Capture.PNG" src="http://h30499.www3.hp.com/t5/image/serverpage/image-id/54978i3415177DA8FA649C/image-size/original?v=mpbl-1&px=-1" border="0" /></P><P> </P><P> </P>Mon, 17 Nov 2014 21:39:51 GMThttp://h30499.www3.hp.com/t5/Calculators/Direction-field-plot/m-p/6673344#M14923Teleboy2014-11-17T21:39:51ZSimplifying radicals
http://h30499.www3.hp.com/t5/Calculators/Simplifying-radicals/m-p/6673326#M14922
<P>How do I use the HP Prime to simplify a radical like this: <IMG border="0" title="rad.gif" height="55" alt="rad.gif" width="102" src="http://h30499.www3.hp.com/t5/image/serverpage/image-id/54976iEF6B877D41170913/image-size/original?v=mpbl-1&px=-1" /></P>Mon, 17 Nov 2014 21:13:36 GMThttp://h30499.www3.hp.com/t5/Calculators/Simplifying-radicals/m-p/6673326#M14922blixel2014-11-17T21:13:36ZVariable substitution on matrices and vectors (50g)
http://h30499.www3.hp.com/t5/Calculators/Variable-substitution-on-matrices-and-vectors-50g/m-p/6667062#M14911
<P>Hi</P><P> </P><P>With the | (where) function im able to quickly substitute variables of an equation with numeric values.</P><P> </P><P>e.g. (x-2)^4+(x-2y)^2, {x 0 y 0}, | (Right-Shift, Tool) gives 16</P><P> </P><P>Let's assume I've generated the hessian matrice and gradient of this function and would like to do the same substitution to get (50 -4 -4 8) and (-32 0).</P><P> </P><P>Whats the quickest way to substitute these variables (| doesn't seem to work with this objects)?</P><P><BR />Regards</P>Sun, 09 Nov 2014 18:23:53 GMThttp://h30499.www3.hp.com/t5/Calculators/Variable-substitution-on-matrices-and-vectors-50g/m-p/6667062#M14911Teleboy2014-11-09T18:23:53Z