Why make this so complicated? Easier argument: let u=9-x^2. Then write x^3=x * x^2. x will disappear from du=-2x dx. Then you can solve for x^2 in u=9-x^2…
when you distributed the -243 you forgot to change the signs in the next step. You where saying it as you were doing it but didn't actually swap the signs in the step that followed
Instructive video, and I know that the main point is to show an example of trig substitution. For this problem however, it is a lot easier to use a normal u-substitution. Still, great videos as always!
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.
Bro! You forgot to distribute the negative sign almost at the end!
this is what you call together the TrU- substitution
But taking the square root of cos^2 θ yields |cosθ|, not cosθ. Wouldn't we have to make sure that the cosine is positive first?
bad video you should feel bad
this is every case of "wdf"
Why make this so complicated? Easier argument: let u=9-x^2. Then write x^3=x * x^2. x will disappear from du=-2x dx. Then you can solve for x^2 in u=9-x^2…
I don't understand where sin comes from? And why don't you integrate by parts?
you still got the right answer the only thing is the sign switch on the u sub expressions
when you distributed the -243 you forgot to change the signs in the next step. You where saying it as you were doing it but didn't actually swap the signs in the step that followed
Instructive video, and I know that the main point is to show an example of trig substitution. For this problem however, it is a lot easier to use a normal u-substitution. Still, great videos as always!
great video sal. keep it up
can you tell what you using to create the video?
how did you created it the process i mean?
OMG Thank You So much, I'm currently taking Calculus 2 and this video is about what I learn today 🙂
Thanks for uploading another one of these, i know this was complicated for me when i was in CalculusI
Great..!
Congrats fat bitch.