TI-BASIC:Artanh
From Learn @ Cemetech
Command Summary
Calculates the inverse hyperbolic tangent of a value.
Command Syntax
tanhֿ¹(value)
Menu Location
The tanhֿ¹( command is only found in the catalog. Press:
- 2nd CATALOG to access the command catalog.
- T to skip to commands starting with T.
- Scroll down and select tanhֿ¹(
TI-83/84/+/SE
1 byte
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.