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SQL-92
Guide and Reference
ACOS Function
Returns the arccosine of expression.
SYNTAX
EXAMPLE
This example illustrates two ways to use the acos function. The first SELECT statement returns the arcosine in radians, and the second returns the arcosine in degrees.
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.
- The expression must be in the range -1 to 1.
- The expression must evaluate to an approximate numeric data type.
COMPATIBILITY
ODBC Compatible
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