55.9 Chapter 1, section 1.2. Riccati Equation. subsection 1.2.6-1. Equations with sine

55.9.1 problem 1
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55.9.3 problem 3
55.9.4 problem 4
55.9.5 problem 5
55.9.6 problem 6
55.9.7 problem 7
55.9.8 problem 8
55.9.9 problem 9
55.9.10 problem 10
55.9.11 problem 11
55.9.12 problem 12
55.9.13 problem 13