Formula not returning array

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I am creating some simple physics simulations for a frame problem, in which I want to show change in angular velocity of one point of a body as an angle changes.

I have assigned 'theta' to be a simple array [0:90] in a script and want a formula (derived for the particular problem) to produce an array of angular velocities as theta changes, and then plot them. The code is only returning a single angular velocity (i.e. velocity at theta = 45 deg) instead of producing an array of angular velocities that can be plotted. Any help is appreciated. Script code is below:

%% Angular Vel of AB

clear

clc

omegaOA = 10.472;

theta = [0:90];

omegaAB = (omegaOA*.08*cosd(theta))/(sqrt(.01-(.08.*sind(theta)+.01).^2));

plot(theta, omegaAB,'r-.')

Matlab produces a blank plot and assigns a single value to omegaAB instead of an array. 'omegaAB = 7.6926' Why is that? Does this require a separate function to be made?