MATLAB: How to Find Coordinate : each line of the circle in polar graph

Question

I want to find, the X,Y coordinate, at 120 degree from line that radius = 5.

so I can plot the new circle with the center : line of radius = 5 direction to 120 degree.

Answer 1

theta = 120 ;   % in degrees 
r = 5 ;  % radius 
% center of circle 
x = r*cosd(theta) ;
y = r*sind(theta) ;