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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.

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Trigonometric Substitution

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.

Comments

Jonathan Eng

for the last problem is it possible to just use u-substitution, instead of doing trigonometric substitution?