Hi M. A. Sadiq,

One way to do it (there are probably better ways) is as follows:

de:=diff(theta(t),t,t)+0.5*diff(theta(t),t)+sin(theta)=0;

dsol:=dsolve({de,theta( 0 )=Pi /4,D(theta)(0)=1},theta(t),numeric,output=listprocedure);

thetaFn:=eval(theta(t),dsol);

Then you can obtain the numerical values by

evalf(thetaFn(t[ i ] ) )

for specified t[ i ].

You can set up a sequence to generate your values and then write them to a file. I am not familiar with Tecplot. Can you read in data files? Is Maple's plotting insufficient for your needs?

Regards,

James

You can also make use of the "op" command in maple, to extract elements from the output from dsolve. More info here:

> http://www.maplesoft.com/support/help/Maple/view.aspx?path=op

Hi

You can get full answer of your question in "http://mapleprimes.com/"

that site is for maple users and almost all problems are answerd.

regards..