Inverse trigonometric functions notation

Hi everyone,

simple question:
I couldn’t find the notation for

  • arccotangent
  • arcsine
  • arccosine
  • and cotangent

in expression does anybody know how you type them?
I couldn’t even find them in the provided list.

You get Acos, Asin, Atan, and Atan2, more are not available.

not even cotangent?
it’s no big deal, you can put the complementary of course but it adds a level of complexity.
could you please put it in next release?

am I dumb or atan disapeared for me ?


I think it’s pretty standard among math programming libraries to only provide sin, cos, and tan along with their inverses, everything else can be derived easily from those three.

cot(θ) = 1/tan(θ)
acot(x) = atan(1/x)

Your expression can be simplified to

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still, you have to admit you were thinking for about 5 mins hehehe
anyway thank you. I will use it.
and I will try to make my expressions ‘cleaner’ in the future :smile:

I got distracted looking up the wiki page for historical trig functions and deciding whether to include this screenshot :stuck_out_tongue:

And it gets worse down the page:

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Could still be both of course. But it seems to be gone here too. Very strange.

good think about this forum: people always help you with your problem.
bad think about this forum: people always distract you with interesting things :smile:

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The expression language in GH1 was modelled on VBScript. It has very limited support for everything. In GH2 the expressions can be typed in C# and VB (and, presumably, Python) and the aim is to provide a much richer mathematical toolset both to expressions and as regular components.

Yeah, found the issue, turns out it was me who was dumb.