What is the measure of angle B?

Ifigured out the question and i dont know what to put here

Arandom number generator is used to model the patterns of animals in the wild this type of study is called

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.