Oracle® Database SQL Language Reference 11g Release 2 (11.2) Part Number E17118-04 |
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ACOS
returns the arc cosine of n
. The argument n
must be in the range of -1 to 1, and the function returns a value in the range of 0 to pi, expressed in radians.
This function takes as an argument any numeric data type or any nonnumeric data type that can be implicitly converted to a numeric data type. If the argument is BINARY_FLOAT
, then the function returns BINARY_DOUBLE
. Otherwise the function returns the same numeric data type as the argument.
See Also:
Table 3-10, "Implicit Type Conversion Matrix" for more information on implicit conversionThe following example returns the arc cosine of .3:
SELECT ACOS(.3)"Arc_Cosine" FROM DUAL; Arc_Cosine ---------- 1.26610367