This calculus video tutorial provides a basic introduction into trigonometric substitution. It explains when to substitute x with sin, cos, or sec. It also explains how to perform a change of variables using u-substitution integration techniques and how to use right triangle trigonometry with sohcahtoa to convert back from angles in the form of theta to an x variable. There's plenty of examples and practice problems in this lesson.
Full 1 Hour 10 Minute Video:
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Integration - Free Formula Sheet:
https://www.video-tutor.net/calculus-formula-sheets.html
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Full 1 Hour 10 Minute Video:
https://www.youtube.com/watch?v=zgjYaOmNL90
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Integration Techniques:
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