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Oracle® OLAP DML Reference 10g Release 2 (10.2) Part Number B14346-01 |
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# ARCTAN2

The ARCTAN2 function returns a full-range (`0` - `2` pi) numeric value indicating the arc tangent of a given ratio. The function returns values in the range of -pi to pi, depending on the signs of the arguments. The values are expressed in radians.

To calculate the angle value (in radians) of a specified tangent that is not a ratio, use ARCTAN.

Return Value

NUMBER

Syntax

ARCTAN2 (n / m)

Arguments

n

  A numeric expression that specifies one component of the ratio. The argument n can be in an unbounded range.

m

  A numeric expression that specifies the other component of the ratio.

Examples

The following example returns the arc tangent of`.3` and`.2`.

    SHOW ARCTAN2(.3/.2)

    .982793723