PostgreSQL ACOS
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Postgresql ACOS
This function returns the arc cosine of X input (inverse cosine). It returns NULL when X is not the range -1 to 1.
Syntax ACOS
X is cosine value.
ACOS(X);
Example 1
postgres=# SELECT ACOS(0);
acos
-----------------
1.5707963267949
(1 row)
Example 2
postgres=# SELECT ACOS(-0.3);
acos
------------------
1.87548898081029
(1 row)
