Is 5 a prime number or a composite number

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.

Hi if you want to play a sports related kahoot go to kahoot.it and type in this code: 659344

I’m still confused on how to work the percentages