Finding y-value of a function with corresponding x-value given

How to use Matlab to determine f(3)-f(5) for a function and interval of your choice.

[darova]

What have you done already? Do you have some ideas?

[Suné Janse van Rensburg]

function y = f(x)
    y = asind(x);
end

plotfunc2d(y, x =-5..5): grid on

I need to plot the function aswell but I'm really lost I don't know what to do

Answer 1

[Jackson Burns]

f = @(x) asind(x);
f(3)-f(5)
a = 0:0.1:5;
plot(a,real(f(a)),a,imag(f(a)))