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| CACOS(3) | FreeBSD Library Functions Manual | CACOS(3) |
NAME
cacos, cacosf,
cacosl, cacosh,
cacoshf, cacoshl,
casin, casinf,
casinl, casinh,
casinhf, casinhl,
catan, catanf,
catanl, catanh,
catanhf, catanhl —
LIBRARY
Math Library (libm, -lm)SYNOPSIS
#include <complex.h>
double complex
cacos(double
complex z);
float complex
cacosf(float
complex z);
long double complex
cacosl(long
double complex z);
double complex
cacosh(double
complex z);
float complex
cacoshf(float
complex z);
long double complex
cacoshl(long
double complex z);
double complex
casin(double
complex z);
float complex
casinf(float
complex z);
long double complex
casinl(long
double complex z);
double complex
casinh(double
complex z);
float complex
casinhf(float
complex z);
long double complex
casinhl(long
double complex z);
double complex
catan(double
complex z);
float complex
catanf(float
complex z);
long double complex
catanl(long
double complex z);
double complex
catanh(double
complex z);
float complex
catanhf(float
complex z);
long double complex
catanhl(long
double complex z);
DESCRIPTION
Thecacos(), casin(), and
catan() functions compute the principal value of the
inverse cosine, sine, and tangent of the complex number
z, respectively. The cacosh(),
casinh(), and catanh()
functions compute the principal value of the inverse hyperbolic cosine, sine,
and tangent. The cacosf(),
casinf(), catanf()
cacoshf(), casinhf(), and
catanhf() functions perform the same operations in
float precision. The cacosl(),
casinl(), catanl()
cacoshl(), casinhl(), and
catanhl() functions perform the same operations in
long double precision.
There is no universal convention for defining the principal values of these functions. The following table gives the branch cuts, and the corresponding ranges for the return values, adopted by the C language.
| Function | Branch Cut(s) | Range |
| cacos | (-infinity, -1) ∪ (1, infinity) | [0, pi] |
| casin | (-infinity, -1) ∪ (1, infinity) | [-pi/2, pi/2] |
| catan | (-infinity*I, -I) ∪ (I, infinity*I) | [-pi/2, pi/2] |
| cacosh | (-infinity, 1) | [-pi*I, pi*I] |
| casinh | (-infinity*I, -I) ∪ (I, infinity*I) | [-pi/2*I, pi/2*I] |
| catanh | (-infinity, -1) ∪ (1, infinity) | [-pi/2*I, pi/2*I] |
SEE ALSO
ccos(3), ccosh(3), complex(3), cos(3), math(3), sin(3), tan(3)STANDARDS
These functions conform to ISO/IEC 9899:1999 (“ISO C99”).| February 15, 2017 | FreeBSD 13.1-RELEASE |
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