Itried to solve it and it keeps saying i got it ,15 points to whoever get it right also a brainlest

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.

Plz hurry evaluate the expression a+b where a=8 and b=19

Find solution of the linear equation y = 2/3x + 1/3