Wolfram Research
Wolfram Math World: Trigonometric Substitution
This resource explains the steps to solving a difficult integration using a given trigonometric substitution and then proceeds to explain which integration technique to apply to solve the integration problem.
Math Medics
S.o.s. Math: Trigonometric Substitutions
This detailed tutorial explains trigonometric substitution. Includes formulas, equations and examples.
Mathematics Archives
Math Archives: Trigonometric Substitution
This resource has many examples of integration using trigonometric substitution that the student can work on and then check their answers. Includes hints.
Interactive Mathematics
Interactive Mathematics: Integration by Trig Substitution
Having trouble integrating those tough functions? Try using Trigonometric Substitution. This lesson demonstrates the process and allows for you to practice using the examples provided.