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tmin 0.03 (Default branch)
04-28-2008
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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 9899:2011. 4th Berkeley Distribution December 11, 2006 4th Berkeley Distribution