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ACOS function (ODBC compatible)
Syntax
ACOS ( expression )
Description
The scalar function ACOS returns the arccosine of expression.
Example
select acos (.5) 'Arccosine in radians' from syscalctable;
ARCCOSINE IN RAD
----------------
1.047197551196598
1 record selected
select acos (.5) * (180/ pi()) 'Arccosine in degrees' from syscalctable;
ARCCOSINE IN DEG
----------------
59.999999999999993
1 record selected
Notes
ACOS takes the ratio (expression) of two sides of a right triangle and returns the corresponding angle. The ratio is the length of the side adjacent to the angle divided by the length of the hypotenuse.
The result is expressed in radians and is in the range -Pi/2 to Pi/2 radians. To convert degrees to radians, multiply degrees by Pi/180. To convert radians to degrees, multiply radians by 180/Pi.
