1) At how many points between the interval (-∞, ∞) is the function f (x): sin x is not differentiable A) 0 B) 7 C) 9 D) 3 Answer: Option AExplanation:The function f (x): sin x is differentiable for all x $\epsilon$ R. Therefore the number of points in the interval (-∞, ∞) where the function is not differentiable are zero.
