We have:

Then we use trigonometric identities to change the negative sign of the trigonometric functions, so:

We clear f(x):

we simply what we can:

Thus, the correct answer is;
Answer:
B. JK is longer than JL
Step-by-step explanation:
JK is 6, JL is 5. Therefore, JK is longer than JL.
It’s D that is the answer