COS function

COS returns the cosine of a value. The COS function take arguments in radians where:

radians = (angle * 2 * 3.1416 / 360)

select cos(3.1415) from dual;

Using COS function to find the cosine of 30 degrees: 


SQL> select COS(30*2*3.1415926/360) From dual;

COS(30*2*3.1415926/360)
-----------------------
             .866025408

SQL> select COS(90 * 3.1415926) from dual;

COS(90*3.1415926)
-----------------
                1

SQL> select COS(45 * 3.1415926) from dual;

COS(45*3.1415926)
-----------------
               -1

SQL>
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