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Solving symbollic

Solving symbollic

When I try to solve the problem in the attach file either with a solve block or root-function I get the message "not converging".
I would like some help, please
Peter Udsen
5 REPLIES 5

Solving symbollic

Peter,

Please post the Mathcad file containing your equations that give the error messages. Mathcad shouldn't have numerical difficulties with a problem like this. Maybe some kind of simplification is needed?

Bonnie

Solving symbollic

Hi

Thank you for your interest. In the meantime I have discovered a blunder I had made solving the problem. I attach my result.

Yours
Peter

Solving symbollic

see equations & solutions attached

Solving symbollic

My attachment didn't attach, sorry.

The formulation was acos(x/6-8/3x)=asin(x/6-20/3x).
The solutions were -4, sqrt(58).
Using MathCad Pro "solve,x->"

Solving symbollic

Another solution is to use a version of the law of sines with the diagonal line drawn in, with the constraint that the sum of the angles between the lower side triangle and the diagonal line triangle sum to 45 degrees. Using crude initial guess values with a Given statement and the minerr function gives a solution.

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