Find the circumference of a circle of radius 2.1m​

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.

Graph the equationy= x+3[tex]y = x + 3[/tex]

Let x = a + bi and y = c + di and z = f + gi. which statements are true?