Graph the difference quotient for f (x) = sin x and h = 0.5, 0.1, and 0.001 on the viewi...

Graph the difference quotient for f (x) = sin x and h = 0.5, 0.1, and 0.001 on the viewing rectangle [0, 2π, π/2] by [-1, 1]. What generalization can you make from these graphs? Show that this quotient can be written as