Find the m *With work*

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.

Math question.. plz me .. best answer all

Given the equation    = 5, solve for x and identify if it is an extraneous solution