acos

Composes a function that returns the arccosine of this function's field result across its extent. The function result is the principal value, in radians, of the inverse cosine of the function's field result, so the function result will lie between 0 and pi.

The function result has no data where this function's field result is less than -1 or greater than 1.

The function result has no data where this function's field result has no data.

The function result extent equals that of this function's field result.