Oracle PL/SQL/Numeric Math Functions/ATAN

ATAN(-1)

   <source lang="sql">

SQL> --ATAN(x):Returns the arctangent of x. SQL> SQL> SQL> select ATAN(-1) from dual;

 ATAN(-1)

---

-.78539816 SQL>

      </source>
   
  

ATAN(x):Returns the arctangent of x

   <source lang="sql">

SQL> --ATAN(x):Returns the arctangent of x. SQL> SQL> select ATAN(1) from dual;

  ATAN(1)

---

.785398163 SQL>

      </source>