How do i plot this in matlab

x = [0:pi/2:2*pi]
y = -(sin(pi/2*cos(x))(-pi/2*sin(x))/cos(x)

Keep getting the "Error: ()-indexing must appear last in an index expression." I understand what the error means, but I've tried replacing some of the () with {}, and I'm still getting the same error. I guess I am unsure which () need to be replaced to {}.

Answer 1

[madhan ravi]

y = -(sin(pi/2*cos(x))Operator missing here(-pi/2*sin(x))./cos(x)

[madhan ravi]

Also there’s an extra parenthesis at the beginning of the equation. See https://in.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html