how do I solve a non linear function

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sumaiya hossain
sumaiya hossain on 4 Aug 2022
Edited: Torsten on 5 Aug 2022
Hi I am trying to solve this function but I keep on getting a warning sign I am unsure to howto put solve for a non liner function
syms t
y = 4*sin(2*pi*t) + exp(-t)./t
y = 
eqn = y -- 0
eqn = 
solv =solve(eqn,t)
Warning: Unable to solve symbolically. Returning a numeric solution using vpasolve.
solv = 
98.5
figure
fplot(y,[-3 10])
grid
  3 Comments
Torsten
Torsten on 5 Aug 2022
Edited: Torsten on 5 Aug 2022
You can restrict the search for a solution to a specific interval, e.g.
syms t
y = 4*sin(2*pi*t) + exp(-t)./t;
eqn = y == 0;
solv =vpasolve(eqn,t,[0,1])
solv = 
0.54308725386344674331298509227806
solv =vpasolve(eqn,t,[1,2])
solv = 
1.505862532193485343436982696241
figure
fplot(y,[0.1 2])
grid

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