Trigonometric substitution with secant (KristaKingMath)

Learn how to use trigonometric substitution with a secant substitution to evaluate an integral.

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Hi, I’m Krista! I make math courses to keep you from banging your head against the wall. ;)

Math class was always so frustrating for me. I’d go to a class, spend hours on homework, and three days later have an “Ah-ha!” moment about how the problems worked that could have slashed my homework time in half. I’d think, “WHY didn’t my teacher just tell me this in the first place?!”

[hg.]

I followed the video, but I'm flummoxed by why we do "trig substitution " in the first place, other than "we were asked to solve using trig sub". But this is first of 3 videos on the subject from the best calc teacher on YouTube, so I'll keep going. Merry Christmas all!

[MsReeses]

You have an excellent way of explaining things in a very clear way. I learn so much when I watch just 2 or 3 of your videos. I wish you were my teacher every year haha

[theodoresweger]

Thank you, love your voice and smile, well thought out.

[zakariazaki]

Thanks for lessons keep going 🤠 greeting from Morocco

[ThePinoyMamba]

Very well explained... we love your videos... thanks...

[enriqueservantesfonseca]

Thanks! I was struggling with a similar problem for one week

[mryip]

thanks, can you please tell me when we should consider whether 0≤θ<π/2 or π/2<θ≤π?

[sakonpure]

I have a question about the domain of sec x. What is it? and why do we have to restrict the domain?

[kristakingmath]

Yes, you could have done it that way as well, good thinking! :D