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1-Visitor
December 5, 2015
Solved

Solving an equation

  • December 5, 2015
  • 2 replies
  • 1934 views

Hello everyone,

I'm new new to using PTC Mathcad and I'm wondering, if there is a method to solve a trigonometric equation with infinite number of solutions (let's say I need just a few of them) and not using given/find structure.


Thanks in advance for any help!

Best answer by RichardJ

Turn the solve block into a function of Bi and z. Then you can pass it different values of Bi and guess values

2 replies

19-Tanzanite
December 7, 2015

What's wrong with the Given-Find structure?

25-Diamond I
December 7, 2015

Symbolic solve ist limited but you may have luck finding solutions to meet a certain constraint using "assume" or fiind "all" solutions using the keyword "fully".

You may use a solve block with symbolic evaluation, too, but I'd prefer the solve command.

Regards Werner

pgutowski1-VisitorAuthor
1-Visitor
December 12, 2015

Thank you very much for your reply. Unfortunately, I still have a problem with this exemple, but now I am able to show you exactly what I mean.

Let's say, I have to solve this. I need at least 7-8 first solutions of this equation. I could use given/find, but I would like to change parameter Bi in the future and then I would have to change guess values as well. Any suggestions? Thanks in advance

math.jpg

RichardJ19-TanzaniteAnswer
19-Tanzanite
December 14, 2015

Turn the solve block into a function of Bi and z. Then you can pass it different values of Bi and guess values