Math Scalar Library
Programming Reference Manual Fortran
Version 1.1 DD-00003-111

19.2 scoscpi - Cardinal Normalized Cosine coscπ(x)

function scoscpi (x) 
function scoscpif(x)

Given a value x this function computes the cardinal cosine of x , cosc (x)= cos(πx)
   π     πx   .