Oracle PL/SQL Tutorial/Numerical Math Functions/ACOS

ACOS(1)

   <source lang="sql">

SQL> SQL> select ACOS(1) from dual;

  ACOS(1)

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        0</source>
   
  

ACOS(-1) (2)

   <source lang="sql">

SQL> select ACOS(-1) from dual;

 ACOS(-1)

---

3.14159265</source>