In Exercises 35-42, graph the function. Then answer the following questions:
(a) On what interval, if any, is the function increasing? Decreasing?
(b) Is the function odd, even, or neither?
(c) Give the function's extrema, if any.
(d) How does the graph relate to a graph of one of the twelve basic functions?
40. g(x)=4cos(x)