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Add arctg and arcctg predefined operators #4504

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blt-r
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@blt-r blt-r commented Jul 5, 2024

We already have tangent and cotangent in the tg/ctg notation, and we have inverse trig functions with arc prefix, so it would make sense to have arctg and arcctg.

These functions are commonly used where I am from.

There are more trig function with missing inverse versions (cot, sec, csc), so maybe it would make sense to add them too, but I don't know how often they are used if at all.

@laurmaedje
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Prior discussions about adding operators: #1090, #2378.

I've honestly lost track of what we decided should and shouldn't be included at this point.

cc: @Enivex

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Enivex commented Jul 7, 2024

Prior discussions about adding operators: #1090, #2378.

I've honestly lost track of what we decided should and shouldn't be included at this point.

cc: @Enivex

My stance is that, if anything, I'd remove tg and ctg, because tan and cot are way more common globally. It's super easy to define your own operators anyway.

If we have to add something, I'd argue that it should be only arctg and not arcctg

(Note that LaTeX doesn't predefine any of the tg variants either.)

@laurmaedje laurmaedje added the waiting-on-author Pull request waits on author label Jul 14, 2024
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I'll defer to @Enivex's judgement on this one, so I'll close this. Thanks still!

Regarding tg and ctg. I think those have been around forever from the original list I took from LaTeX. I don't have any particular attachment to keeping them around.

@laurmaedje laurmaedje closed this Jul 20, 2024
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