You just need to solve
Make the substitution and don't forget to get the new integration limits.
A question that I have been given asks me to use a certain substitution to find the answer exactly. The only thing is not only do I think I can manage without it the substitution is the most random thing one I've seen.
Upper Boundary = 2, Lower Boundary = 0
Use the substitution x = 2sin u to exactly evaluate this definite integral.
Should I just do it without using that substitution?