Not enough input arguments "Error using Cos"

I am trying to build a matrix A which has the following cos and sin components, However when I try to put them together, I get the error of "Not enough input arguments". When I copied a single line and executed, I got the answer, I don't know why this is not working when I run everything together.

%% Test

phi_r = 0;

phi = pi/2;

alpha = 0.35;

omega = 1;

% Initial step (Matrices)

A = [ 0 ,0 ,0 ,0;...

v_phi .* cos(phi_r) .* cos (phi),-v_phi .* cos(phi_r) .* cos (phi), 1, -v_phi./alpha.* sin(phi_r).*cos(phi);...

v_omega * cos(phi_r) .* cos (phi), -v_omega .* cos(phi_r) .* cos (phi),0,-v_omega/alpha.* sin(phi_r).*cos(phi);

eta.*alpha.*cos(phi_r).*sin(phi),-eta.*alpha.*cos(phi_r).*sin(phi),0,-eta.*sin(phi_r).*sin(phi)];

Answer 1

[Walter Roberson]

No space between cos and (

You are inside a list building operation. Spaces can indicate that an entry has ended and a new one is about to begin. MATLAB does not determine a new entry to start if the previous entry ends in one of the binary operators

   3+ 5   %all one expression
   3 + 5  %all one expression 
   3 +5   %two expressions, 3 and +5

cos is not a binary operation, so

   3 + cos (x)

is two entries, 3+cos and (x). In turn 3+cos is 3+cos() which is the function invoked with no arguments.

[Praveen Kumar Pakkirisamy]

I see the mistake now. Thank you it works.