Consider the following for the two (02) items that follow:

Let the function y = (1 - cos x)^-1 where$x \ne 2n\pi$ and n is an integer

What is the range of the function?

Consider the following for the two (02) items that follow:
Let the curve f(x) = |x - 3|

What is the domain of the function (f(x))?

Consider the following for the two (02) items that follow:
Let f = {(1, 1), (2, 4), (3, 7), (4, 10)}

If f(x) = px + q then what is the value of (p + q) ?

Consider the following for the two (02) items that follow:
The function f(x) satisfies  $f(x), f \left( \frac{x}{y} \right) = \frac{f(x)}{f(y)}.$  ​for all positive real values of x and y, and f(2) = 3

What is f(16) equal to?