Section 11,85: TAND

 TAND (real-number)

 A function that returns the tangent of the argument.  The argument
 must be in degrees; it is treated modulo 360.
 +------+---------+----------+------------+-------------+        
 | Args | Generic | Specific |  Argument  | Result Type |
 +------+---------+----------+------------+-------------+
 |  1   |  TAND   | TAND     | REAL*4     | REAL*4      |
 |      |         | DTAND    | REAL*8     | REAL*8      |
 |      |see note | QTAND    | REAL*16    | REAL*16     |
 +------+---------+----------+------------+-------------+

 NOTE: QTAND is not available in DEC Fortran.