# 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.
thanks.

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?
thanks.

Hello
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

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

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.