You didn't change the integration limits when changed the variable. By the way, that's the correct value for the integral.
Could you post the "correct answer"?
I know I have my integral correct:
So then I did this:
After I evaluate I get which is the wrong answer.
I know this is a lot of work, but can someone work this and just point out where my error is? Don't need all the steps, unless I screwed something up.
But I put 2x back in for "u" and then evaluated at the old limits. Should I not have done that?
This is from that SOLVED problem you helped me with before. Guess I didn't really solve it
Wish I could post the correct answer, but it is in webassign, so I cant get it. I found one in the book that was almost identical:
Find Vol of solid for area btw. curves: y = sinx y=0 with same limits
the book answer for that one is which is almost exactly what my answer is.