COTAND (real-number)

  Class:  Elemental function - Generic

  Returns the cotangent of the argument.  The argument must be in
  degrees; it is treated modulo 360.

  +------+----------+----------+------------+-------------+
  | Args | Generic  | Specific |  Argument  | Result Type |
  +------+----------+----------+------------+-------------+
  |  1   |  COTAND  | COTAND   | REAL*4     | REAL*4      |
  |      |          | DCOTAND  | REAL*8     | REAL*8      |
  |      |          | QCOTAND  | REAL*16    | REAL*16     |
  +------+----------+----------+------------+-------------+