Solve. which number is equivalent to the expression below? │ 12 – 8 │ a. 4 b. -4 c. 20 d. -20

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.

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?

Find cot x if sin x cot x csc x = √2