arcsin and other functions

Enrico Gregorio shared this question 5 months ago
Answered

There is a discrepancy in how functions are input and output, with Geogebra Graphing Calculator.

If I ask for “arcsin” I get something like “arcsin(<x>)”, which is then printed as sin^-1 in the box.

Now, I object to sin^-1 on mathematical grounds: it is abusive because the sine function has no inverse.

However, I acknowledge that the notation is used.

It would be good if the output could be changed according to the user's preference. But maybe it's already possible: is it?

Particularly strange is the logarithm: if I want the natural logarithm, I need to type in “log”, which prompts for the argument and then it's abruptly transformed into “ln” (another notation I dislike).

Comments (3)

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Now it's even worse, because there's no choice of using “log” for the natural logarithm. This should really be left to user preferences.

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Now log is log in base 10, as in pocket calculators. For natural logarithm you must use ln.

Please see https://wiki.geogebra.org/e...


About asin that is automatically transformed into sin^-1, this is usual in computational math environment and pocket calculators (see e.g. Wolfram Alpha) /viGHJk73n00AAAAASUVORK5CYII=

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The fact that calculators or Wolfram use sin^-1 doesn't make the notation correct. It is wrong under mathematical grounds and I wish to see math according to my preferences, not someone else's.

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