Plato which restricted domain would allow you to define the inverse cosine function?

0 ≤ x ≤ π

Step-by-step explanation:

In order to define the inverse cosine functions, the domains of the cosine functions are restricted.

One major condition to define an inverse of a function is that the original function must be one‐to‐one which means that one value from the domain should correspond to only one value in the range.

So we have a restriction that is placed on the values of the domain of the cosine function which is the following:

0 ≤ x ≤ π

correct answer:

i^31 = -i