Asolid figure without any bases and with only one curved surface

Simply 8x squared + 5(7x squared- x) - 2x =

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.

Write and solve a real word problem that involves determining distance on a coordinate plane