Trigonometry Workbook For Dummies
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Here’s how you integrate a trig integral that contains tangents and secants where the secant power is even and positive. Like with all tangent/secant integrals, you use the tangent-secant version of the Pythagorean identity,

  1. Lop off a secant-squared(x) factor and move it to the right.

  2. Convert the remaining secants to tangents with the Pythagorean identity,

  3. Solve by substitution, where u = tan(x) and


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Mary Jane Sterling taught algebra, business calculus, geometry, and finite mathematics at Bradley University in Peoria, Illinois, for more than 30 years. She is the author of several For Dummies books, including Algebra Workbook For Dummies, Algebra II For Dummies, and Algebra II Workbook For Dummies.

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