vcs.c File Reference

Versed cosine function. More...

#include "prim.h"

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Functions
double	vcs (double x)
	Versed cosine function. More...

Detailed Description

Versed cosine function.

Definition in file vcs.c.

Function Documentation

vcs()

double vcs

(

double

x

)

Versed cosine function.

vercos = 1+cos(x)
       = 2*cos(x/2)*cos(x/2)

Definition at line 45 of file vcs.c.

References cos().

Referenced by RealNumber::VerCosine().

{
    double a = x / 2.0;
    double b = cos(a);
    double c = 2 * b * b;
    return c;
}

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