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# Need help with this MathCad Problem :)

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## Need help with this MathCad Problem :)

(OP)
Hi,

i have a Problem with MathCad 15. Iam new to the Software.

The Problem is only with the following Parameter ( phi.c[0..2).

The Formula with the hopfully correct declaration but the wrong solution:

With try an error i found the Problem Part it is the sin(phi.c) if i just type in the correct degree it works.

I have no clue what i did wrong.
jasper

### RE: Need help with this MathCad Problem :)

It IS a common problem, but better to see it than to make a rash assumption.

You've defined phi as a vector and passed the entire vector into the definition of K.agh. While that's technically correct, Mathcad doesn't always behave correctly because you have other vectors in the same equation. I couldn't tell if the indices for phi and delta were correlated, or not, but this is what I got, and note that the second two results for K.agh are different than what you got by putting in 30° directly, since that winds up using only 30° for all three indices. You have two choices for fixing it

https://files.engineering.com/getfile.aspx?folder=...

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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### RE: Need help with this MathCad Problem :)

(OP)
Thank you so much!! Yes with 30° i only have the correct solution for K.agh[1

I will take the second option and in the final print i just hide the definition of i.

Nevertheless thank u so much !

### RE: Need help with this MathCad Problem :)

I really appreciate you all guys to discuss this. I had also face the same problem from few days. but you guys did this.

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