/sys$common/syshlp/helplib.hlb PASCAL, Predeclared Routines, Arithmetic, SIN  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The SIN function returns a real value that represents  the  sine
  of the specified parameter.

  Syntax:

     SIN( x )

  The parameter 'x' can  be  an  integer  or  REAL  type,  and  is
  expressed in radians.