For this exercise you need to know the definitions of the
Chapter 5, Problem 58(choose chapter or problem)
For this exercise you need to know the definitions of the functions cosh and sinh, which were given in Exercises 55 and 57, respectively. (a) Use a graphing utility to graph the equation y cosh(x) sinh(x). What do you observe? (b) Use algebra to show why the graph in part (a) looks as it does. [That is, use the definitions of cosh(x) and sinh(x) to simplify the quantity cosh(x) sinh(x).]
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