Can you help me solve part B of this question please? with answer

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

Can anyone me with 32,33,36,37,and 40.