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problem with fzero in my code

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Hanna Sundling
Hanna Sundling 2019-10-14
评论： Walter Roberson 2019-10-15
fzero won´t work, anyone knows what may be the problem?
Skärmavbild 2019-10-14 kl. 08.29.30.png

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回答（2 个）

Fabio Freschi
Fabio Freschi 2019-10-14
your fun is neither acceppting nor using inputs
You should write the symbolic function like this
fun = @(x)cos(x);
x0 = fzero(fun,0.5);
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Hanna Sundling
Hanna Sundling 2019-10-14
I am also going to find how many tangents lines that goes torugh the origin for cosx and that is why I talk abot xsinx in my comments.
Walter Roberson
Walter Roberson 2019-10-15
I do not understand what tangent lines through the origin for cosx has to do with xsinx ? Tangent lines to cosx would have to do with sinx not xsinx .

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Ekemini Stephen
Ekemini Stephen 2019-10-14
Create a function file and save it to the same dierctory as
function y = f(x)
y = cos(x);
end
Then use this function in the section of your script as
%%
fun = @f; % function
x0 = 0.5; % initial point
ff = fzero(fun,x0);

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