This is difficult to answer just in this amount of space, however on the aerospace web.org website they gave an example :
The drag coefficient for a cone pointed into the airflow is a bit more complex since it depends on the cone's shape. In particular, the drag will vary depending on how steep the angle of the cone is. The angle of interest is called the half-vertex angle, ε, measured from the centerline of the cone to one of its walls. The larger this angle becomes, the higher the drag of the cone is.
Good luck