Cannot solve Sin and Cosine Waves DEs

[Bebokkos]

I got a simple system of two diff. eqs; The functions in play are: z(t)=sin(t) and w(t)=cos(t). Tried to solve the system

Given
z'(t) = w(t)
w'(t) = -z'(t)
with IC: z'(0)=1 w'(0)=0
S=Odesolve(t,8?,100)

Solution fails... Even tried Rkadapt. Any ideas; (See attached MC file)..

 

[corus]

If you click on the last equation it says too few initial conditions.

Tata

 

[Occupant]

If this this is what you're talking about - ok, if not let me know.

 

[Bebokkos]

Thank Occupant. This is exactly what I wanted. I realized what my my mistake was. Thanks a lot. If you like, take a look at my other question about the nonlinear DE.