[LON-CAPA-users] Hyperbolic Trig Function Problem

[Justin Gray]

Have you considered tried calling on tanh(x) in Maxima using
&cas('maxima',   ) instead of using &tanh(x)?

Justin

--

*Justin Gray*
Senior Lecturer | Department of Mathematics
Simon Fraser University | SCK 10531
8888 University Dr., Burnaby, B.C. V5A 1S6
T: 778.782.4237
Simon Fraser University is located on the Unceded Coast Salish Territories
of the xʷməθkʷəy̓əm (Musqueam), Səl̓ílwətaʔ/Selilwitulh (Tsleil-Waututh),
Kwikwitlem, and Skwxwú7mesh Úxwumixw (Squamish) Peoples


On Wed, Jan 29, 2020 at 3:43 PM Harding, Gene L <glhardin at purdue.edu> wrote:

> Hi,
>
>
>
> Does anyone have experience using the hyperbolic trig functions in
> LON-CAPA? I have recently been coding some new problems that use the
> &tanh() function. I was comparing the results to those I got using MATLAB,
> and after some troubleshooting it appears that the difference is the tanh.
> Specifically, the &tanh($x) function in LON-CAPA *always* returns an
> imaginary value of zero.
>
>
>
> Here is the code:
>
> $tanh               = &tanh($gamma*$len);
>
> $tanh_real      = Re($tanh);
>
> $tanh_imag    = Im($tanh);
>
> where $gamma is a complex number and $len is a scalar. MATLAB computes a
> complex number for tanh in the examples I have tried. Am I doing something
> wrong? Does LC not compute tanh correctly?
>
>
>
> Best regards,
>
>
>
> Gene L. Harding, PE
>
> Associate Professor of ECET
>
> Purdue University
>
> 574-520-4190
>
>
>
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