_csin_sub cacos_sub cacosh_sub casin_sub casinh_sub catan_sub catanh_sub ccos_sub ccosh_sub ccot ccot_sub cexp_sub cexpm1 cexpm1_sub clog1p clog1p_sub clog_sub csinh_sub ctan_sub ctanh_sub

catan_sub() void catan_sub ( doublecomplex  z, doublecomplex *  atanz  ) atan(z) of complex number Purpose catan_sub is the subroutine version of C99 function catan. Parameters [in] z Complex argument z. [out] atanz atan(z).