Algebra 2 help! Please explain your answers!

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

Hi my sisters and brothers can tell me the answer because i don’t understand the question

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.