## FNsinc

#### Routine

double FNsinc (double x)

#### Purpose

Evaluate the sin(pi*x)/(pi*x) function

#### Description

This function returns the value of the sinc function, where

                 sin (pi x)
      sinc (x) = ---------- .
                    pi x

#### Parameters

<- double FNsinc
  Returned value
-> double x
  Input value

#### Author / revision

P. Kabal / Revision 1.6 2003/05/09

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