Implementation status: to be implemented
double complex casin(double complex z);
float complex casinf(float complex z);
long double complex casinl(long double complex z);
The functions compute the complex arc sine of z, with branch cuts outside the interval [-1, +1] along the real axis.
z - a complex number.
These functions return the complex arc sine value, in the range of a strip mathematically unbounded along the imaginary axis and in the interval [-π/2, +π/2] along the real axis.
No errors are defined.