casin(3) BSD Library Functions Manual casin(3)
NAME
casin -- complex inverse sine function
catan -- complex inverse tangent function
SYNOPSIS
#include <complex.h>
double complex
casin(double complex z);
long double complex
casinl(long double complex z);
float complex
casinf(float complex z);
double complex
catan(double complex z);
long double complex
catanl(long double complex z);
float complex
catanf(float complex z);
DESCRIPTION
casin(z) computes the inverse sine of the complex floating-point number
z, with branch cuts outside the interval [-1, 1] on the real axis.
ctan(z) computes the inverse tangent of the complex floating-point number
z, with branch cuts outside the interval [-i, i] on the imaginary axis.
Both functions return values in a strip of the complex plane with
unbounded imaginary part, and real part in the interval [-Pi/2, Pi/2].
NOTES
casin and catan are defined in terms of the complex inverse hyperbolic
functions as follows:
casin(z) = -i * casinh(i*z),
catan(z) = -i * catanh(i*z).
SEE ALSO
casinh(3) catanh(3) complex(3)
STANDARDS
The casin() and catan() functions conform to ISO/IEC 9899:1999(E).
4th Berkeley Distribution December 11, 2006 4th Berkeley Distribution
Mac OS X 10.6 - Generated Thu Sep 17 20:18:42 CDT 2009