ctan.c raw

   1  #include "complex_impl.h"
   2  
   3  /* tan(z) = -i tanh(i z) */
   4  
   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