ACOS

The ACOS function returns the arc-cosine of the input argument; that is, the angle (in radians) whose cosine is x.

Syntax

ACOS (x)

Remarks

The table lists the valid input argument data types and the resulting output data types.

Data Type of Argument

Output Type

Notes

BIGINT, DECIMAL, FLOAT, INTEGER, NUMERIC, REAL, SMALLINT, TINYINT

FLOAT

Input argument is between -1.0 and +1.0.
Output value is in radians.

NULL

NULL

 

Example

SELECT ACOS(0.8660254037844387)

The result is 0.5235987755982987 (pi/6) radians, which is 30 degrees.