Answer:
Step-by-step explanation:
It's not c or d. It's not much but I hope it helps.
-2 is the answer when i figured out the problem

Notice that if

, then

. Recall the definition of the derivative of a function

at a point

:

So the value of this limit is exactly the value of the derivative of

at

.
You have
Answer:
actually what is this is you is this a geometry, trigonometry I don't know what to call