Solution: In 1930, proceed as in Example 5 to find a solution of the given initial-value
Chapter 3, Problem 23(choose chapter or problem)
In Problems 19-30, proceed as in Example 5 to find a solution of the given initial-value problem.
\(y^{\prime \prime}+y=\csc x \cot x\), \(y(\pi / 2)=-\pi / 2\), \(y^{\prime}(\pi / 2)=-1\)
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