MATLAB using cosh and sinh-CodePudding

I am trying the find the inverse Laplace voltage of a circuit, but when I compute it MATLAB output contains sinh and cosh. Is there a way to make MATLAB compute it?

Here is my code:

syms s

F=((s^2) 12*s 20)/(s*((s^2) 10*s 4))

f=ilaplace(F)

f=vpa(f,5)

CodePudding user response：

The expression for f contains the t symbol, you have to substitute a value for t before you can compute the output at that time t; the error message directs you precisely to that solution. I chose t = 5, you can change that as you wish.

syms s

F = (s^2   12*s   20) / (s*(s^2   10*s   4));
f = ilaplace(F); 
% 5 - 4*exp(-5*t)*(cosh(21^(1/2)*t)   (3*21^(1/2)*sinh(21^(1/2)*t))/14)
f = subs(f, 5);

double(f)
ans =
    4.5083