The slope of the slew is steeper than the slope of the sine wave at zero.Hi,
Well, compare the slope of the ramp (slew) to the slope of a sine wave at the zero crossing as that is the maximum slope for a sine wave.
Then, deduce what the op amp would have to be able to do in order to reproduce the sine wave near that point on the sine wave.
This might be one of those things that you have to be told or you have to have read up on it already. Some things in electronics are not exactly obvious unless you really think about it for extended periods of time.
OK, here is the part I lack of. "What the op amp would have to be able to do in order to reproduce the sine wave near that point on the sine wave?"
Any guidance here? Sorry I couldn't answer that question as I am unsure. Any help would be appreciated.