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

18.1 problem 29
18.2 problem 30
18.3 problem 31
18.4 problem 32
18.5 problem 33
18.6 problem 34
18.7 problem 35
18.8 problem 36