====== casin ====== double complex casin(double complex z); ==== description of casin ==== Calculate the Complex Arc Sine #include #include int main( void ) { long double complex zlong=4.2 + I*2.34; double complex zdouble=(double complex)zlong; double result; result = casin(zdouble); printf("casin(%f + I*%f) = %f\n", creal(zdouble), cimag(zdouble), result); return 0; } ===== output of casin c example ===== casin(4.200000 + I*2.340000) = 1.053132