Oracle SQL - Function TANH function

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Introduction

TANH - Returns the hyperbolic tangent of a value.

The hyperbolic trigonometric function takes arguments in radians where, 

radians  = (angle * 2 * 3.1416 / 360)

Using the TANH function to find the hyperbolic tangent of 30 degrees:

Demo

SQL>
SQL> SELECT TANH(30*2*3.1416/360)
  2  FROM dual;-- from  www  .  j av a2 s. c om

TANH(30*2*3.1416/360)
---------------------
             00000.48

SQL>