COS Function
COS is a trigonometric function that returns the cosine of a number. The return value is in radians and is between PI/2 and -PI/2.
Syntax
COS(double_precision)
Argument
- number
-
The input parameter is a double precision number.
Return Type
The COS function returns a double precision number.
Examples
The following example returns cosine of 0:
select cos(0); cos ----- 1 (1 row)
The following example returns the cosine of PI:
select cos(pi()); cos ----- -1 (1 row)
