| Firebird Documentation Index → Firebird 2.1 Language Ref. Update → Internal functions → ATAN() |
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Available in: DSQL, PSQL
Added in: 2.1
Description: Returns the arc tangent of the argument.
Result type: DOUBLE PRECISION
Syntax:
ATAN (number)
The result is an angle in the range <-π/2, π/2>.
If the external function ATAN is declared in your database, it will override the internal function. To make the internal function available, DROP or ALTER the external function (UDF).
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| Firebird Documentation Index → Firebird 2.1 Language Ref. Update → Internal functions → ATAN() |