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: https://bit.ly/41WNmI9 Direct Link to The Full Video: https://www.bit.ly/3zuP2s0 Integration - Free Formula Sheet: https://www.video-tutor.net/calculus-formula-sheets.html __________________________________ Full 1 Hour 10 Minute Video: https://www.youtube.com/watch?v=zgjYaOmNL90 Join The Membership Program: https://bit.ly/46xaQTR Integration Techniques: https://www.video-tutor.net/integration-techniques.html