PostgreSQL ACOS() function

ACOS() function

The PostgreSQL acos() function is used to return the inverse cosine of a given argument.

Uses of ACOS() Function

• Trigonometric Calculations: Calculate the arc cosine value of a number.


• Geometry: Determine angles in geometric computations.


• Engineering Applications: Perform calculations involving angles and trigonometric functions.


• Scientific Research: Analyze data involving trigonometric relationships and functions.

Syntax:

acos(a)

PostgreSQL Version: 9.3

Pictorial presentation of PostgreSQL ACOS() function

Example 1: PostgreSQL ACOS() function

Code:

SELECT ACOS(0) AS "Acos (0)";

Sample Output:

    Acos (0)
-----------------
 1.5707963267949
(1 row)

Example 2: PostgreSQL ACOS() function

Code:

SELECT ACOS(1) AS "Acos (1)";

Sample Output:

 Acos (1)
----------
        0
(1 row)

Example 3: PostgreSQL ACOS() function

Code:

SELECT ACOS(-1) AS "Acos (-1)";

Sample Output:

    Acos (-1)
------------------
 3.14159265358979
(1 row)

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