Help it not to easy and I need to do this help

If you answer right ill give brainliest, : )

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.

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48