I need help on the task 1 ranking the slopes problems

How do you solve a question like this?

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.

Which statement best explains why ben uses the width hi to create the arc at j from point k