Integration by Substitution | Integral Calculus
In this video we introduce the concept of integration by Substitution. This is a method that involves integration by introducing a variable to represent a function. Several questions have been solved to help you understand.

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![Integrating using t=tan(x/2) substitution - [The Weierstrass substitution]](https://i.ytimg.com/vi/QCAtgZRelno/hqdefault.jpg?sqp=-oaymwEnCNACELwBSFryq4qpAxkIARUAAAAAGAElAADIQj0AgKJDeAG4AvMY&rs=AOn4CLDxyRV7tuDBrJWFZFu3FWO6Vu8-aA&usqp=CCY)
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Integrating using t=tan(x/2) substitution - [The Weierstrass substitution]

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Integration By Parts

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