If the functions are inverses, then f(g(x)) = x.
A.

The functions are inverses of each other.
B. The domain of f(x) = x≠3. The domain of g(x) is x≠0.
The domain of f(g(x)) is (-∞, 0) ∪ (0, ∞).
The domain of g(f(x)) is (-∞, 3) ∪ (3, ∞).
The answer is 79. it needs to be 20 characters
Cos x = 15÷17
because cos is adjacent side over hypotenuse.