Re: HP 33S formula solver Message #8 Posted by Norris on 23 Apr 2007, 4:44 p.m., in response to message #1 by Sam Levy
If you like the Solver on the 33S, you might also like the "Multiple Equation Solver" (MES), an even more powerful feature found on HP 48, 49, and 50 series calculators. The MES allows you to group several equations together, and will automatically switch between them as necessary to solve for a given variable.
Example: you enter and group three related equations for the properties of circles:
C = PI*D
A = PI*R^2
D = 2*R
where A = area, C = circumference, D = diameter, and R = radius.
Then you can enter a value for C, and then ask the MES to calculate the value of A. None of the equations above directly link C and A. But the MES will find A anyway: it will automatically use the first equation to calculate D, then the third equation to calculate R, then the second equation to calculate A.
The MES, unlike the 33S Solver, also recognizes units. For example, if C is entered as '6_in', then the MES will calculate A as '2.8648_in^2'
Edited: 23 Apr 2007, 4:45 p.m.
