VMS Help  —  CRTL  ctan
    Returns the complex tangent of its argument.

    This function is supported on OpenVMS Integrity servers and
    Alpha only.

    Format

      #include  <complex.h>

      double complex ctan  (double complex z);

      float complex ctanf  (float complex z);

      long double complex ctanl  (long double complex z);
Additional Information: explode extract
Argument Description Return Values
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