Please answer correctly! I will mark your answer Brainliest!

How is working backward similar to solving an equation?

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.

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)