(1)
| |||
(2)
| |||
(3)
|
where is a gamma function and is a double factorial.
(1)
| |||
(2)
| |||
(3)
|
where is a gamma function and is a double factorial.
Weisstein, Eric W. "Wallis Cosine Formula." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/WallisCosineFormula.html