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  • Users: Bebokkos
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  1. Bebokkos

    Cannot solve Sin and Cosine Waves DEs

    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)..
  2. Bebokkos

    Solving a Nonlinear DE with MathCad?

    Hi! I'm currently struggling to solve the following nonlinear 2nd order DE with MC: y'' - (1/y)(y')^2 - y(dy/dx + 1) = 0 with ic: y(0)=0.235 and bc: dy/dx=(2x)^-0.5 at x=50. I've tried odesolve and rkadapt with no success. In fact, everywhere I looked I got solutions for ODE only. Can't...
  3. Bebokkos

    Iterating a Solve Block

    Hi I am trying to iterate a solution from a solve block, but nothing seems to work. My block contains a simple matrix equation yielding a solution for the vector v (of two elements only), i.e., Solve (v-b)'(X'X)(v-b)=G Find(v) Now, v consists of v0 and v1 elements. I want to use...

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