functions
01-07-2019, 06:55 PM
Post: #1
 rolfjg8 Junior Member Posts: 1 Joined: Aug 2018
functions
My HP 48G/GX has a function to solve for a variable in symbolic, for example: C=2*Pi*r*h, solving for "r". The HP 48G/GX returns the formula for r=C/2*Pi*h. I realize that this is a simple formula to solve for the variable r or h, but in complicated formulas the solve for a variable function in
symbolic would be appreciated.
Does the HP Prime Graphing Calculator has a function like that? I went through the "Catalog" menu, the app menus, but could not find one.
01-07-2019, 08:16 PM
Post: #2
 Didier Lachieze Senior Member Posts: 1,149 Joined: Dec 2013
RE: functions
Have you tried: solve('C = (2*π*r*h)',r) ?
01-07-2019, 11:36 PM
Post: #3 compsystems Senior Member Posts: 1,193 Joined: Dec 2013
RE: functions
[CAS] MODE (Symbolic operation)
solve( C = 2*π*r*h, r, '=' ) [enter] r = C/(2*h*π)

HOME MOD (Numerical operation)
solve(C = (2*π*r*h),r,'=') [enter] error

LO SUFICIENTEMENTE BUENO ES ENEMIGO DE LA EXCELENCIA.
01-08-2019, 09:33 AM
Post: #4
 DrD Senior Member Posts: 1,098 Joined: Feb 2014
RE: functions
(01-07-2019 11:36 PM)compsystems Wrote:  ...
HOME MOD (Numerical operation)
solve(C = (2*π*r*h),r,'=') [enter] error

With the use of double quotes, here are two ways to reach the CAS solve() command:

[HOME]
CAS.solve("'C = (2*π*r*h)',r");
CAS("solve('C = (2*π*r*h)',r)");
01-08-2019, 08:08 PM (This post was last modified: 01-09-2019 01:00 PM by informach.)
Post: #5 informach Member Posts: 109 Joined: Jul 2015
RE: functions
Hi!, rolfjg8 :
Per example, if you needed calculate, the surface area of cylinder, as ...
C=2*pi*R*(H+R) =~ 6.28319*R*(H+R)
Assuming = Base radius "R" and height "H"
Then in the HP PRIME, you can in CAS MODE and Apps Solve ...
Write in Solve Symbolic View ...
C=6.28319*R*(H+R)
Press button Num and see ...
C:
R:
H:
Example ...
R= 5
H=25
Put the bar in C, and press Solve.
The result, is ... 942.4785
If needed find the radius "R", the formulae, is ...
R=C/6.28319*(H+R)
01-09-2019, 03:22 AM
Post: #6 bbenson Junior Member Posts: 6 Joined: Sep 2015
RE: functions
(01-08-2019 09:33 AM)DrD Wrote:
(01-07-2019 11:36 PM)compsystems Wrote:  ...
HOME MOD (Numerical operation)
solve(C = (2*π*r*h),r,'=') [enter] error

With the use of double quotes, here are two ways to reach the CAS solve() command:

[HOME]
CAS.solve("'C = (2*π*r*h)',r");
CAS("solve('C = (2*π*r*h)',r)");

I tried the second one and got a syntax error... 01-09-2019, 07:12 AM
Post: #7
 parisse Senior Member Posts: 1,050 Joined: Dec 2013
RE: functions
If you want to do symbolic manipulations, press the CAS key!
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