ccos.c File Reference

#include "prim.h"
#include "math.h"
#include "complex.h"

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Functions
complex	ccos (complex z)
	Cosine of complex number. More...

Function Documentation

complex ccos

(

complex

z

)

Cosine of complex number.

Version

1.1

Date

2007/08/20

a+bi
real =  cos(a) * cosh(b)
imag = -sin(a) * sinh(b)

Definition at line 51 of file ccos.c.

References cchsh(), cimag(), cos(), cpack(), creal(), and sin().

Referenced by ComplexNumber::Cosine().

{
    complex w;
    double a, b;
    double ch, sh;

    a = creal(z);
    b = cimag(z);
    cchsh(b, &ch, &sh);
    w = cpack((cos(a) * ch), (-sin(a) * sh));

    return w;
}

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