1. ## wallis product problem

2. Originally Posted by szpengchao
Do you have any work as of yet?

3. Originally Posted by szpengchao
The first part is a routine reduction formula question found all over MHF and indeed all over the net (you don't seem to have done much research). A MHF thread:

http://www.mathhelpforum.com/math-he...n-formula.html

For the other parts, I suggest you first play around with concrete values of n to get the feeling for the formula.