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.

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Full 1 Hour 10 Minute Video:

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[NASAFanboy]

Trig sub is one of the hardest integration techniques to learn and you explain it in such an easy to follow way.

[janine]

I just want you to know that I’ve got a 96 in Integral and Differential Calculus because of you! I can’t thank you enough!

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[restfulcube-notyet]

integration used to be so much simpler ... and then this came along

[jasonjackson]

I wish this channel had been around when I was in undergrad. I remember watching my professor explain this and wondering why this class was a requirement for Econ at UCLA. Now, many years later, I’m still waiting for a chance to show off my trig substitution skills. I’m getting my MBA in 2 weeks and I didn’t need it there either.

[pixelninja]

2:38 "now we gotta do some math" legendary

[phoenx]

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[Coreyahno]

For all you people struggling through Calc 2 right now, just keep at it and take comfort in the fact that Calc 3 and Differential Equations won’t be nearly as bad. I’m in D.E right now and it’s actually kind of fun!

[Diamond-vylx]

This is what online math classes should be like

[AVLife]

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[nuridaw]

The last time I learned Calculus was almost 20 years ago, and this year I need to tutor Calculus. Your videos really really helped me. You are really gifted with being able to explain complex things in simple ways. THANK YOU.

[nathankraft]

I watched an hour long lecture from my professor and did not understand this but watched 2 minutes of your video and I already understand it better. Thank you for your service to confused college students.

[aidenxvv]

When it comes to finding the missing side of the right triangle, it's worth noting that it always turns out to be the square root from the original integral that made us need to do a trig sub in the first place

[calebnguyen]

I watched this video an hour before my test in desperate need of help since I did not understand it. I saw a question and I got it right because of you. Thank you so much!

[maryconnot]

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[donpowers]

This is great video. The presenter goes along very well and does not edit out the few small oopps that we all do when solving equations. Well done . Thanks

[ihasknees]

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[avunz]

This dude is covering calc2 while I'm doing it. It's one of the best feeling in the world.

[PunmasterSTP]

I tutor calculus students and yesterday I realized I was rusty on trig substitution. This video was just what I needed; thanks for sharing!

[eri]

I’m so thankful you made a video on this, I went crazy trying to understand this when the textbook just put it with no explanations