SQL Server/T-SQL Tutorial/Math Functions/DEGREES

DEGREES converts a float value, which represents an angle in radians, into the value of this angle in degrees.

4>
5> SELECT DEGREES(PI()/4)
6> GO
------------------------
                      45
(1 rows affected)
1> SELECT DEGREES(ACOS(0.5))
2> GO
------------------------
      60.000000000000007
(1 rows affected)