Hi, I have attached the question.

1. (18 = 9x2 marks) In this question you will learn about a function called hyperbolic tangent which is defined in terms of functions hyperbolic sine and hyperbolic cosine. Hyperbolic sine and cosine were defined and investigated in the tutorial questions for week 5. You will need to work these tutorial questions before you can do this question and/or read section $6.9 in Anton-Bivens Davis on hyperbolic functions. The question also builds on your knowledge from MATH 141 or equivalent course, and so will serve as a bit of a refresher :-). Define tanhe = sinh c cosh r (see the tutorial questions for week 5 for the definitions of sinh r and cosh r). A. What is the domain of tanh r? b. Find the intervals/points where tanh r > 0, tanhr = 0 and tanhr