Let u=sec(3x+5)
\(=3cdot int frac{1}{3u}du\) \(=3cdot frac{1}{3}cdot int frac{1}{u}du\) \(=3cdot frac{1}{3}ln left|uright|\) \(=3cdot frac{1}{3}ln left|3sec left(xright)+5right|\) \(=ln left|3sec left(xright)+5right|+C\)Let u=sec(3x+5)
\(=3cdot int frac{1}{3u}du\) \(=3cdot frac{1}{3}cdot int frac{1}{u}du\) \(=3cdot frac{1}{3}ln left|uright|\) \(=3cdot frac{1}{3}ln left|3sec left(xright)+5right|\) \(=ln left|3sec left(xright)+5right|+C\)BOOK
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