1 #include "complex_impl.h" 2 3 /* tan(z) = -i tanh(i z) */ 4 ctan(double complex z)5 double complex ctan(double complex z) 6 { 7 z = ctanh(CMPLX(-cimag(z), creal(z))); 8 return CMPLX(cimag(z), -creal(z)); 9 } 10