Calculus 2: Integration of Trig Functions (9 of 16) Integral of csc^2(x)=?

In this video I will calculate the integral of the trig function csc^2(x).

Next video in the series can be seen at:

[titleloanman]

I can't wait to be done with Calc 2. Every single problem feels like you have to already know what they answer is before you even try to begin solving it.

[mckboulos]

Hi Pr,
All those substitution seem so random, I feel like I have to be lucky to come up with the idea of subsituting cotx. Is there an other way of doing it without having to guess the answer in advance?

[piersonm]

Is there a way to know what you should use for u, or is cotx just chosen because it makes the proof work

[nachopaoletti]

great explanation! im from argentina and its totally understandable, well done!

[ahmedal-ebrashy]

Hello SIr you have been missed. One thing I criticize about that respectfully, is because there not a specific technique like if I am trying this by myself, I would know why I should try letting u=cot x, but great videos and list as always have been. Best regrads :D

[austinnewton]

how can you let u be cotx if you dont have a cos in the integrand?

[alisapuskala]

damn thank u didn't know how to do this

[duanedonaldson]

Professor, do you use the Magic Hexagon to teach Trigonometry or Calculus in this case? I admit it does not give the solution but it may lead to a hard-to-understand solution as I instantaneously have the final answer for this elementary question.

[海外スポーツ和訳チャンネル]

this is impossible. the substitution is too random

[eveliohernandez]

really, thanks for share video. could you help me?
I have one.

[WarrenJay]

it's crazy how substition method doesn't work when you use ' u = sin x '

∫1/u du dx <---