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Re: dsolve
Posted:
Jun 13, 2013 9:10 AM


On 6/13/2013 8:51 AM, Helmut wrote: > In Shampine et al. "Solving ODEs with MATLAB" (2003), p. 18, Exercise > 1.1, an example from MATLAB (2000) "help dsolve" is cited: > >>> Y = dsolve('(Dy)^2 + y^2 = 1', y(0) = 0') > > with the correct solution > > Y = [ sin(t) ] > [ sin(t) ] > > Now, with Matlab 2012a student, for an identical input I get the solution > > Y = > cosh((pi*i)/2 + t*i) > cosh((pi*i)/2  t*i) > > which seems to me to be wrong. > > What should I do? > Helmut > >
After getting this seemingly odd answer, try the following:
z = simplify(Y)
z =
sin(t) sin(t)
Alan Weiss MATLAB mathematical toolbox documentation



