What is the length of the altitude of the equilateral triangle below

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.

Pqrs is an isosceles trapizoid and s =31 fimd p

What is the vertex of the parabola defined by the equation (x − 2)2 = -12(y − 2)? a. (-12, 2) b. (2, 2) c. (6, 2) d. (2, -2)