MATLAB program to find the roots of an equation

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Mohamed Adel
Mohamed Adel 2018-7-21
评论： Mohamed Adel 2018-7-21
Write a MATLAB program to find the roots of the following equation for 0.2≤C≤2 (take ∆ C=0.1). Then plot the obtained roots versus the constant C. cos(x)=C*x
That's my try and I don't know what I did wrong
  2 个评论
Steven Lord
Steven Lord 2018-7-21
This sounds like a homework assignment. If you show us what you've tried already to solve the problem and ask a specific question about where you're having difficulty we may be able to offer suggestions for how to proceed.
Mohamed Adel
Mohamed Adel 2018-7-21
I tried to use fsolve to determine the roots but I didn't get the roots That's my try I don't know what I did wrong

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Basil C.
Basil C. 2018-7-21
Instead of using fsolve try using vpasolve
syms x
c=0.2:0.1:2;
y=cos(x)-c*x;
for i=1:numel(y)
sol(i)=vpasolve(y(i),x);
end
Now you can continue with plotting the graph
the approximate solution of each equation is stored in the variable sol

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