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The tanhֿ¹( Command

Command Summary Command Syntax Calculator Compatibility Token Size
Calculates the inverse hyperbolic tangent of a value. tanhֿ¹(value) TI-83/84/+/SE 1 byte

The tanhֿ¹( command is only found in the catalog. Press:
1. 2nd CATALOG to access the command catalog.
2. T to skip to commands starting with T.
3. Scroll down and select tanhֿ¹(

The tanhֿ¹( Command

The tanhֿ¹( command calculates the inverse hyperbolic tangent of a value. tanhֿ¹(x) is the number y such that x = tanh(y).

tanhֿ¹(x), although it can be defined for all real and complex numbers, is real-valued only for x in the open interval (-1,1). Since Z80 calculators have their hyperbolic functions and inverses restricted to real values, ERR:DOMAIN is thrown when x is outside the interval (-1,1).

The tanhֿ¹( command also works for lists.

tanhֿ¹(0)
    0
tanhֿ¹({-.5,.5})
    {-.5493061443 .5493061443}

Error Conditions

  • ERR:DOMAIN when taking the inverse tanh of a number not between -1 and 1.
Authors: KG