The measure of the interior angle of a regular 30-gon is 168 degree
and its exterior angle is 180-168=12 degree
Answer: OPTION D.
Step-by-step explanation:
For this exercise it is important to remember the following Trigonometric Functions:

Knowing this, we can identify that:

Therefore, the ratio
is equivalent to this Trignometric function:

The possibility would be 50 percent if 3 is included.
The parent function is f(x) = x^3
The domain are all x values (-infinity, infinity)
The range are all y values (-infinity, infinity)