ccos(3M)

DESCRIPTION

These functions are available only for IA-64.

ccos() returns the complex cosine of z.

ccosf() is a float complex version of ccos(); it takes a float complex argument and returns a float complex result.

USAGE

To use these functions, compile with the default -Ae option. Make sure your program includes <complex.h>. Link in the math library by specifying -lm on the compiler or linker command line.

RETURN VALUES

ccos(conj(z)) = conj(ccos(z)) and ccos is even.

ccos(+0+i0) returns 1-i0.

ccos(+0+iinf) returns NaN+-i0 (where the sign of the imaginary part of the result is unspecified) and raises the invalid floating-point exception.

ccos(+0+iNaN) returns NaN+-i0 (where the sign of the imaginary part of the result is unspecified).

ccos(x+iInf) returns NaN+iNaN and raises the invalid floating-point exception, for finite nonzero x.

ccos(x+iNaN) returns NaN+iNaN and optionally raises the invalid floating-point exception, for finite nonzero x.

ccos(+Inf+i0) returns +Inf-i0.

ccos(+Inf+iy) returns +Inf(cos(y)-isin(y)), for finite nonzero y.

ccos(+Inf+iInf) returns ±Inf+iNaN (where the sign of the real part of the result is unspecified) and raises the invalid floating-point exception.

ccos(+Inf+iNaN) returns +Inf+iNaN.

ccos(NaN+i0) returns NaN+-i0 (where the sign of the imaginary part of the result is unspecified).

ccos(NaN+iy) returns NaN+iNaN and optionally raises the invalid floating-point exception, for all nonzero numbers y.

ccos(NaN+iNaN) returns NaN+iNaN.

ERRORS

No errors are defined.

SEE ALSO

cos(3M), cacos(3M), complex(5).

STANDARDS CONFORMANCE

ccos(), ccosf(): ISO/IEC C99 (including Annex G, IEC 60559-compatible complex arithmetic)