I found a minor problem with trigonometric functions. The following problem occurs only for a value of 30 degrees, as you can see the value of sin evaluates differently depending on the construction of the math. And only when I am modifying the value of phi in expression shown.

It would not be a problem if a value of phi = 30 was not common in geotechnical engineering.


[MATH]φ:30deg[/MATH]
[MATH=eng]γ:1.3[/MATH]
[MATH=eng]δ:atan(tan(φ)/γ)[/MATH]
[MATH=eng]δ=23.9468@'deg[/MATH]
[MATH=eng]β:sin(δ)[/MATH]
[MATH=eng]β=1.2177[/MATH]
[MATH=eng]sin(δ)=0.4059[/MATH]


Any thoughts?

Hello,

The solution is to apply Optimization|Numeric or None on the region:
[MATH=eng]δ←atan(tan(φ)/γ)[/MATH]
This is a common advice to do first when you need just the numerical values.

BTW, the degrees does not work properly in v0.92

Regards,
Radovan

Wrote

BTW, the degrees does not work properly in v0.92

It doesn't wort in one case only - when you try to evaluate it numerically in a single line like:


P.S.: Will try to release new SMath Studio version as soon as possible.

Regards.

Thanks for the help

Hello,
Also in v.093 remains the problem reported by Scottg. The solution indicated by Radovan, it works properly.

Regards,
Sergio

Fixed in SMath Studio 0.94.



Regards.