Bug 324404

Summary:	Wrong arcsinh function
Product:	[Frameworks and Libraries] analitza	Reporter:	Andrea Arteaga <andyspiros>
Component:	core	Assignee:	Aleix Pol <aleixpol>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	unspecified
OS:	Linux
Latest Commit:	http://commits.kde.org/analitza/2c5fb464936473c581cf1b79d8a68cfdebd7a083	Version Fixed In:	4.11.3

Description Andrea Arteaga 2013-09-02 15:18:15 UTC

The function arcsinh is wrong. If you compare the 2D plot provided by KAlgebra with the one given by e.g. Wolfram|Alpha, you'll notice a big difference.

(See http://www.wolframalpha.com/input/?i=arcsinh%28x%29)

Reproducible: Always

Comment 1 Christoph Feck 2013-09-19 00:28:06 UTC

It actually computes arccoth (which is not supported by analitza yet) in operations.cpp. See also http://en.wikipedia.org/wiki/Inverse_hyperbolic_function

Comment 2 Aleix Pol 2013-10-28 12:48:04 UTC

Git commit 2c5fb464936473c581cf1b79d8a68cfdebd7a083 by Aleix Pol.
Committed on 28/10/2013 at 12:44.
Pushed by apol into branch 'KDE/4.11'.

Improve the definition of some trigonometric functions

Especially Inverse hyperbolic functions

M  +5    -5    analitza/operations.cpp

http://commits.kde.org/analitza/2c5fb464936473c581cf1b79d8a68cfdebd7a083