tan

   Returns a double value that is the tangent of its radian
   argument.

   Format

     #include  <math.h>

     double tan  (double x);

     float tanf  (float x); (Integrity servers, Alpha)

     long double tanl  (long double x); (Integrity servers, Alpha)

     double tand  (double x); (Integrity servers, Alpha)

     float tandf  (float x); (Integrity servers, Alpha)

     long double tandl  (long double x); (Integrity servers, Alpha)
 

Additional information available:

Argument        Description     Return_Values