CASIN(3) BSD Library Functions Manual CASIN(3)

NAME
     ccaassiinn - complex inverse sine function
     ccaattaann - complex inverse tangent function

SYNOPSIS
     ##iinncclluuddee <>

     double complex
     ccaassiinn(double complex z);

     long double complex
     ccaassiinnll(long double complex z);

     float complex
     ccaassiinnff(float complex z);

     double complex
     ccaattaann(double complex z);

     long double complex
     ccaattaannll(long double complex z);

     float complex
     ccaattaannff(float complex z);

DESCRIPTION
     ccaassiinn(z) computes the inverse sine of the complex floating-point number
     z, with branch cuts outside the interval [-1, 1] on the real axis.

     ccttaann(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].

NNOOTTEESS
     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 ccaassiinn() and ccaattaann() functions conform to ISO/IEC 9899:1999(E).

4th Berkeley Distribution      November 9, 2006      4th Berkeley Distribution