Its full width at half maximum is .
Its instrument function is
which has a maximum of and full width at half maximum .
Its full width at half maximum is .
Its instrument function is
which has a maximum of and full width at half maximum .
Weisstein, Eric W. "Cosine Apodization Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CosineApodizationFunction.html