TAN is one of the vital Numeric/Math functions of Oracle. It is used to get the tangent of a number. The TAN function is supported in the various versions of the Oracle/PLSQL, including, Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i and Oracle 8i.
TAN ( number )
number: It is used to specify the number in radians to get the tangent value of.
The tangent value of 1 is 1.55740772465, and so is the result.
The tangent value of -1 is -1.55740772465, and so is the result.
The tangent value of 0 is 0, and so is the result.