for x= -2.0, -1.0, 0.0, 1.0, 2.0 radians and y=cosine(x) , which of the following codes would correctly define x and calculate y in matlab

To define x and calculate y in MATLAB, you can use the following code:

main.m
x = [-2.0, -1.0, 0.0, 1.0, 2.0]; % Define x values

y = cos(x); % Calculate y values using cosine function

disp(y); % Display the calculated y values
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This code defines the values of x as an array [-2.0, -1.0, 0.0, 1.0, 2.0]. It then uses the cos function in MATLAB to calculate the cosine of each value in x and stores the results in the array y. Finally, the disp function is used to display the calculated y values.

Note that in MATLAB, trigonometric functions like cos expect the input to be in radians, so you don't need to convert the values of x in this case.