Plot points along circumference using Trigonometry

circle.py

import math


radius = 20
circumference_points_ratios = [(math.cos(degree), math.sin(degree)) for degree in range(360)]
circumference_points = [(x * radius, y * radius) for x, y in circumference_points_ratios]
circumference_points_ints = [(int(x), int(y)) for x, y in circumference_points]


for y in range(-30, 30):
    for x in range(-30, 30):
        if (x, y) in circumference_points_ints:
            print("*", end="")
        else:
            print(" ", end="")
    print()

$ python circle.py
                                                            
                                                            
                                                            
                                                            
                                                            
                                                            
                                                            
                                                            
                                                            
                                                            
                                                            
                        *************                       
                      ***           ***                     
                    ***               ***                   
                   **                   **                  
                 **                       **                
                **                         **               
                *                           *               
               *                             *              
              *                               *             
             **                               **            
             *                                 *            
            **                                 **           
            *                                   *           
           **                                   **          
           *                                     *          
           *                                     *          
           *                                     *          
           *                                     *          
           *                                     *          
           *                                     **         
           *                                     *          
           *                                     *          
           *                                     *          
           *                                     *          
           *                                     *          
            *                                   *           
            *                                   *           
            **                                 **           
             *                                 *            
             **                               **            
              *                               *             
               *                             *              
               **                           **              
                **                         **               
                  *                       **                
                   **                   **                  
                    ***               ***                   
                      ***           ***                     
                        *************