16 Chapter 1, section 1.2. Riccati Equation. subsection 1.2.7-3. Equations containing arctangent.

 16.1 problem 19
 16.2 problem 20
 16.3 problem 21
 16.4 problem 22
 16.5 problem 23
 16.6 problem 24
 16.7 problem 25
 16.8 problem 26
 16.9 problem 27