Question: Need help with MATLAB how would I write this to solve this question. find the x and y coordinates of the minimum value of the

Need help with MATLAB how would I write this to solve this question. find the x and y coordinates of the minimum value of the function f(x) = 5/cos(x).^2 over the interval (-2pi,2pi)

I tried this, but didn't work

x = linspace(-2pi,2pi,100);

y = 5./cos(x).^2;

plot (x,y), grid

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