//! *this file is freware. Use it at your own risk.
  //! @file trig.hpp
  //! @author Dejan D. M. Milosavljevic
  //! @version 1.0
  //! @date 2003
  //! Missig trigonometrics functions from standard math library.
  //! *this file is freware. Use it at your own risk.
  
#ifndef _DDMRM_trigonometry_HPP_
 #define _DDMRM_trigonometry_HPP_

 #include <cmath>

 //namespace S_DDMRM
  //{
   //namespace S_math
    //{

     template< typename N_number >
      inline
      N_number
      sec
       (
        N_number const& x 
       ) 
       { 
        return   N_number( N_number(1)/sin(x) ); 
       }
     
     template< typename N_number >
      inline
      N_number
      asec
       (
        N_number const& x 
       ) 
       { 
        return  N_number( asin( N_number(1)/x) ); 
       }
     
     
     template< typename N_number >
      inline
      N_number
      csec
       (
        N_number const& x
       ) 
       { 
        return  N_number( N_number(1)/cos(x) ); 
       }
     
     template< typename N_number >
      inline
      N_number
      acsec 
       ( 
        N_number const& x 
       ) 
       { 
        return  N_number( acos( N_number(1)/x) ); 
       }
     
   
     
     template< typename N_number >
      inline
      N_number
      ctan
       (    
        N_number const& x 
       ) 
       { 
        return  N_number( cos(x)/sin(x) ); 
       }
     
    
     template< typename N_number >
      inline
      N_number
      actan
       (
        N_number const& x
       ) 
       { 
        return  N_number( atan( N_number(1)/x) ); 
       }
     

  //  }
// }

#endif