What is the arccos of 2 ?

What is the arccosine of 2 ?

arccos 2 = ?


The arccosine is the inverse cosine function.

Since the cosine function has output values from -1 to 1,

the arccosine function has input values from -1 to 1.

So arccos x is undefined for x=2.

arccos 2 is undefined


See also

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