English: So $z_{0} = \frac{\pi}{6}$ and n=2 , so that here we are getting exactly 3, so this was the Cauchy integral formula, here 2+1=3 if it is 2 here, the derivative is second derivative.
Telugu: కాబట్టి $z_{0} = \frac{\pi}{6}$ మరియు n=2, కాబట్టి ఇక్కడ మనకి సరిగ్గా ‘3’ లభిస్తుంది.