Warning while solving 2 Simultaneous ODE's using dsolve

Answer 1

[Shravan Kumar Vankaramoni]

Hi,

Yes, you will get that warning if you try to pass equations and conditions directly to "dsolve". You need to use "diff" function to define a differential. You can do something as following for "d2y/dt2" with the initial conditions y(0)=b and y′(0)=1

syms y(t) a b
eqn = diff(y,t,2) == a^2*y;
Dy = diff(y,t);
cond = [y(0)==b, Dy(0)==1];
ySol(t) = dsolve(eqn,cond)

Similar to the condition, equation can also be a vector. Hope this helps

Refer to the below documentation for more information:

https://www.mathworks.com/help/symbolic/dsolve.html#d123e145909