musl/src/complex/ctan.c

10 lines
166 B
C

#include "libm.h"
/* tan(z) = -i tanh(i z) */
double complex ctan(double complex z)
{
z = ctanh(CMPLX(-cimag(z), creal(z)));
return CMPLX(cimag(z), -creal(z));
}