12 Chapter 1, section 1.2. Riccati Equation. subsection 1.2.6-4. Equations with cotangent.

  12.1 problem 38
  12.2 problem 39
  12.3 problem 40
  12.4 problem 41
  12.5 problem 42
  12.6 problem 43
  12.7 problem 44
  12.8 problem 45
  12.9 problem 46