To find the indefinite integral of (sin x)^n i have used a formula which can be derived using integration by parts. This sets up a second order recurence relationship and the way i have tried to find the indefinite integral of (sin x)^n is to try and solve this recurrence relationship.

I don’t know if it correct. I believe my algebra and the proccess to solve the recurrence relationship is correct but maybe somewhat who knows more about recurrence relationships may be able to tell me I have done something illegal.

Elliot 17 years old

I do plan to work that out this semester. It's on my hw list. : )