Transformation matrix

[XDN]

Hi community

in this worksheet prime does not want to calculate

anyone have an idea, the function is however defined

Prime8 attached file

[Werner_E · Accepted solution]

For the argument in the function T( ) you used "theta" with a literal index "j", but the defining expression on the RHS uses "thetaj" without index.
If you change this either way, it works as expected:

[XDN]

I'm ashamed, probably a moment of weakness sorry

thanks Werner