Which reasonable statement about the novel that elizabeth just purchased?

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

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.

The difference between the measures of two complementary angles is 14. find the measure of both angles.