Need help with this :|

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

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.