Attachment 19022

My teacher assigned this as a review for the test. This particular question looks like definition of derivative to me:

$\displaystyle \displaystyle \lim_{h \to 0} \frac{f(x+h)- f(x)}{h}$

Would that make f(x + h) = sin x

and f(x) = 1/2? I'm very confused on which parts are which.