Multiple choice for a test! please help me ( links = report )

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

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.