Question

What does `sec(arccos(3))+3sec(arc csc(9))` equal?

Answer 1

Not defined using real numbers.

Explanation:

Something's funky here.

I have seen several problems like this, where `arcsin` or `arccos` has an argument that is less than `-1` or greater than `1`. Such an argument is not the sine or cosine of any real argument, so we can't have a solution with real numbers only.