#18

You must find maximums or minimums by using the derivative.
5.2; 15, 42ab, 46, 50, 53 as specified below.
Hint on 42b:  Include both + and - when you take a 6th root or ^(1/6).
On 46b, do find the time but actual maximum value is optional.
On 53:  On (b-i), I require you to use csc functions instead of sin as in back of book.  On (j-m), change to sin and factor out sin functions.  On m, consider at or near endpoints 0 and pi/2.  Throughout, try to avoid looking at the back of book unless necessary; it's fine if you "get ahead" of what they are asking on each step.