Because all the coordinates of a line has the same slope. So, we can use any two of them to find the slope.
First we are going to find the common denominator of both fractions. To do that, we are going to multiply their denominators:

Now we can rewrite our expression using the common denominator:

Finally, we can use the trig identities:

and

to simplify our trig expression:
We can conclude that the correct answer is the fourth one.
We can't answer the question, you haven't given us the information, we need to know what the x is here, or if they gave you a value.
Answer:
what's scary is, im both,but nO